July 2012 50c And 20c Coin Survey - Coin Community Forum

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penny dreadful Valued Member Australia 318 Posts	Posted 07/28/2012 12:53 am As the month is almost done, I don't anticipate getting any more coins from the bank to noodle -so here is what I found for the month. Most were from coin bags from the coin machines (in the CBA) $200 worth in a 50c bag; $100 in a 20c bag. Others were in Chubbs or $10 and $4 bags by the bank branch from banks without a coin machine. These are not infallible...I had one lot of 50s that was 6 coins over, and had a stray 20c and 5c as well. Then again, I was 8 short in a lot of counted baggies, and another coin short in another coin machine lot. Also, the Kiwi 20 cent coins get through the coin machine.. As well as the short coins, I had a NZ 50c and a Fijian 50c as strays - both in Chubb rolls. Best catch was an Incused Millenium, and also found a 1980 coin with a faulty/split planchet- sounds like it is made of lead!! There was another $200 bag that I couldn't add to the results, as I'm sure someone dumped a collection of commem 50s into the machine that day: 38 Weary's plus a heap of WW2 2005's, and 3 x 1991 RAMS, plus a stack of States would have distorted the results...though I took the RAMS, thank you very much Total of 5495 Aussie 50c coins COA 1969 x77 1971 x104 1972 x19 1973 x15 1974 x37 1975 x100 1976 x149 1978 x150 1979 x141 (14 were D Bar) 1980 x203 (34 DBar) 1981 x148 1983 x260 1984 x118 1985 x1 1993 x6 1997 x35 1999 x159 2004 x164 2006 x500 2007 x206 2008 x295 2009 x288 2010 x279 2011 x101 TOTAL = 3721 COA's (67.7%) COMMEMS 1970 Cook x19 1977 QE2 x47 1981 Wedding x24 1982 Games x195 1988 Bicent x7 1991 RAM x2 1994 Family x105 1995 Weary x64 1998 Explorers x99 2000 Royal x17 2000 Millenn x99 (1 Incused) 2001 Federal x280 2001 QLD x7 2001 ACT x3 2001 NSW x6 2001 Vic x11 2001 Tas x8 2001 SA x3 2001 WA x9 2001 NT x8 2001 NI x4 2002 Outback x46 2003 Volunteer x87 2004 Fauna x57 2005 WW2 x223 2005 Games x188 2010 Oz Day x156 TOTAL = 1774 Commems (32.3%) 20c results to follow soon Report this Post to the Staff

ozcoins Pillar of the Community Australia 1005 Posts	Posted 07/28/2012 02:54 am Wow PD! You are really getting through those coins! I might do some analysis of production numbers vs what you are finding. If you are interested I will post the results here. Well done with the incused flag. Are you looking for Rotated 2010 CofA? Edited by ozcoins 07/28/2012 02:57 am Report this Post to the Staff
Squire Wilson Pillar of the Community Australia 653 Posts	Posted 07/28/2012 03:18 am Great effort penny dreadful An intelligent statistical analysis of the 50 cent coins. So for you it looks like a 1 in 5495 chance of gaining a Millennium 50 cent incused. I have 2 of these coins, after having noodled through about 7700 50 cent coins. That means that you may be close to finding your second incused also, that is if you look through another 2205 50 cent coins Squire Edited by Squire Wilson 07/28/2012 03:19 am Report this Post to the Staff
penny dreadful Valued Member Australia 318 Posts	Posted 07/28/2012 03:40 am Quote: Are you looking for Rotated 2010 CofA? You bet If I can find a nice one, that is - and at a reasonable cost!! That's why I'm hitting the 50s fairly hard, trying to get one out of circ. before wear and tear take their toll Here's the 20 cent results. 5750 coins in theory, but 4 coins short in one lot, and one up in another, so a nett of 5747 coins. Of these, 27 are foreign: 1 x 1960 British florin, and 26 x Kiwi 20 cents; one was the Maori design of 1990. That makes 0.47% of the overall total as foreigners So a total of 5720 Aussie 20s PLATY's 1966 x111 1967 x181 1968 x94 1969 x38 1970 x48 1971 x22 1972 x33 1973 x62 1974 x68 1975 x124 1976 x138 1977 x95 1978 x106 1979 x62 1980 x203 1981 x423 1982 x159 1994 x35 1996 x64 1997 x58 1998 x101 1999 x234 2000 x141 2001 x328 2002 x117 2004 x285 (4 were Pointy A) 2005 x274 2006 x473 2007 x132 2008 x618 2009 x304 2010 x213 TOTAL = 5344 (93.43%) COMMEMS 1995 UN x1 2001 Bradman x6 2001 NSW x8 2001 QLD x zero 2001 ACT x2 2001 Vic x3 2001 Tas x1 2001 SA x3 2001 WA x3 2001 NT x1 2001 NI x5 2003 Volunteer x16 2005 WW2 x138 2010 ATO x68 2011 Wedding x43 2011 Volunteers x8 2011 Womens x70 TOTAL = 376 (6.57%) The 2004 pointy A's tend to have weak rims, so they are a bit more worn than they should be.. Very few 2001 states series are showing up - for example I'm yet to find a Queensland in the 20c coins, and the 2011 Volunteer is scarce here in Melbourne at least. Report this Post to the Staff
Peter THOMAS Pillar of the Community Australia 2830 Posts	Posted 07/28/2012 09:47 am two Ram's heads, a Bradman, and a couple of other highlights - makes noodling attractive. Report this Post to the Staff
molydeii Pillar of the Community Turkey 870 Posts	Posted 07/29/2012 09:26 am I think British large 10 pence and old florins are almost equal weight and diameter with the Australian 20c. I was wondering sometime ago, if they're circulation over there, and your post has answered my question. :) Report this Post to the Staff
ozcoins Pillar of the Community Australia 1005 Posts	Posted 08/01/2012 08:43 am PD, I was looking at your figures, and you have missed 1996 50c Do you still have the number handy? edit: Dont worry I worked out it was 166 Edited by ozcoins 08/01/2012 08:51 am Report this Post to the Staff
penny dreadful Valued Member Australia 318 Posts	Posted 08/01/2012 08:54 am Well spotted ozcoins. Silly me.. There were 166 for the year 1996, oh you have found that already!! Cheers Report this Post to the Staff
ozcoins Pillar of the Community Australia 1005 Posts	Posted 08/01/2012 09:12 am OK. I have done some analysis of 50c coins from 1969-2009 (because I only have mintage figures till 2009). I have compared the number of coins made for each year to the total number made from 69-09 to get a percentage of "what was made". Then I did a similar comparison for what PD found while searching. I think the figures really tell us what is popular with collectors. The bigger the difference between what was made, and what was found shows just how much collectors have taken each coin out of circulation. I think that the sample size might not be big enough to draw very accurate conclusions (eg if 0, or 2 1985 coins were found it would affect the figures a bit), but probably still show general trends. If you copy the following data into notepad. Save as "file.csv" Then it should open in your favourite spreadsheet program. Let me know if there are any questions or comments. PS. I hope at least goatieman likes the stats! year,mintage,proportion of total made,PD july,proportion PD found 1969,14,1.67%,77,1.55% 1970,16.5,1.97%,19,0.38% 1971,21.1,2.52%,104,2.10% 1972,5.6,0.67%,19,0.38% 1973,4,0.48%,15,0.30% 1974,9,1.08%,37,0.75% 1975,19.1,2.28%,100,2.02% 1976,27.3,3.26%,149,3.00% 1977,25,2.99%,47,0.95% 1978,25.8,3.08%,150,3.02% 1979,24.9,2.97%,141,2.84% 1980,38.7,4.62%,203,4.09% 1981,24.1,2.88%,148,2.98% 1981wedding,20,2.39%,24,0.48% 1982,49.6,5.93%,195,3.93% 1983,48.9,5.84%,260,5.24% 1984,26.3,3.14%,118,2.38% 1985,1,0.12%,1,0.02% 1988,9,1.08%,7,0.14% 1991,4.7,0.56%,2,0.04% 1993,1,0.12%,6,0.12% 1994,21.3,2.54%,105,2.12% 1995,15.9,1.90%,64,1.29% 1996,19.3,2.31%,166,3.35% 1997,4.3,0.51%,35,0.71% 1998,22.4,2.68%,99,2.00% 1999,20.3,2.43%,159,3.21% 2000,16.6,1.98%,99,2.00% 2000 visit,5.1,0.61%,17,0.34% 2001,43.1,5.15%,280,5.65% 2001ACT,2,0.24%,3,0.06% 2001NSW,3,0.36%,6,0.12% 2001NI,2.2,0.26%,4,0.08% 2001NT,2.1,0.25%,8,0.16% 2001QLD,2.3,0.27%,7,0.14% 2001 SA,2.4,0.29%,3,0.06% 2001 TAS,2.2,0.26%,8,0.16% 2001 VIC,2.8,0.33%,11,0.22% 2001 WA,2.4,0.29%,9,0.18% 2002,11.5,1.37%,46,0.93% 2003,13.9,1.66%,87,1.75% 2004 koala,10.2,1.22%,57,1.15% 2004,17.9,2.14%,164,3.31% 2005WW2,26.6,3.18%,223,4.50% 2005games,20.5,2.45%,188,3.79% 2006,59.3,7.08%,500,10.08% 2007,19.9,2.38%,206,4.15% 2008,33,3.94%,295,5.95% 2009,19,2.27%,288,5.81% ,837.1,,4959, Edited by ozcoins 08/01/2012 09:32 am Report this Post to the Staff
mschipp Valued Member Australia 95 Posts	Posted 08/01/2012 09:20 am ozcoins - great analysis of the data!! Report this Post to the Staff
ozcoins Pillar of the Community Australia 1005 Posts	Posted 08/01/2012 09:31 am Thought I would put a picture so people can see without mucking around. Report this Post to the Staff
Pedro Valued Member Australia 176 Posts	Posted 08/01/2012 5:13 pm Excellent analysis - looks like everyone loves their commemoratives! Pedro Report this Post to the Staff
awildeheart Valued Member Australia 295 Posts	Posted 08/02/2012 05:03 am Penny dreadful, wow! Excellent dedication to record keeping. This info is very useful, so cudos and thanks. Enworb, I thought I knew a few things re computer tips, but didn't know about saving data as a csv file to make it convert to a readable Excel file. Many thanks for that tip and for the number crunching. Report this Post to the Staff
penny dreadful Valued Member Australia 318 Posts	Posted 08/02/2012 06:12 am Thanks for putting up the stats ozcoins , they are pretty illuminating. Yep, the expected vs. actual for the commems really shows up a disparity; back of the envelope calculating from your percentages gives 42.21% actual mintage for commems as a percent of total, yet of what I found in circulation there's only 32.62% of commem 50's. Shows pretty clearly that quite a few commems are squirrelled away. I usually get about 2/3rds COA's and 1/3 of commems typically in a lot when getting a stack of 50 cent coins from the bank. Another thing you've shown is the scarcity of the 1985 COA; according to published mintage of 1 Million, there should be as many found as 1993 - also 1M, but I know the 1985 is much harder to locate than the '93. Do other noodlers get similar figures ? Quote: That means that you may be close to finding your second incused also, that is if you look through another 2205 50 cent coins Da daaa....found one yesterday, so yes I was due Only took another 800 coins, of which 23 were Millenniums, and just the one was an Incused.... Report this Post to the Staff
ozcoins Pillar of the Community Australia 1005 Posts	Posted 08/02/2012 5:02 pm PD, You did the real work by collecting the data. Thanks for sharing your results. I get similar results that the 85 is much harder to find than the 93. A similar sort of analysis of results for the 77 10c I did a little while ago uncovered that the publihed figure of 10.9 million on the RAM site and in some books is wrong and they are actually more common. This was backed up by discovery that a higher number was published in some older books. I think if we do some similar analysis for a denomination that is less collected (eg 5c or 10c) we might come up with some a good estimate of natural attrition of coins (rather than how quickly collectors remove them from circulation). Report this Post to the Staff
Mr T Pillar of the Community Australia 2180 Posts	Posted 08/03/2012 8:01 pm Quote: Another thing you've shown is the scarcity of the 1985 COA; according to published mintage of 1 Million, there should be as many found as 1993 - also 1M, but I know the 1985 is much harder to locate than the '93. Do other noodlers get similar figures ? Yeah, I've noticed that too. I think someone else recently said that they find around eight 1993 for every one 1985, or something like that. Report this Post to the Staff
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