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key dates

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Valued Member
United States
67 Posts
 Posted 12/28/2012  10:48 pm Show Profile Bookmark this topic Add msteele to your friends list Get a Link to this Message

Ok. I feel like my sorting is only half... well not up to par. I think if I got to go through them I might as well pull out the key dates. This is what I got.

Nickels

1- 1950D
2- 1939D
3- 1938S
4- 1938D
5- 1939S
6- 1951S
7- 1955P
8- 1949S
9- 1950P
10 1948S
11 2009 P
12 2009 D

Dime: I can't find anything

Pennies: I am only interested in the memorial key dates and cannot find a thing.

Thanks Guys

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United States
6842 Posts
 Posted 12/28/2012  10:56 pm  Show Profile Bookmark this reply Add Fuzzy317 to your friends list Get a Link to this Reply
I am a little confused
are you saying you found those nickels and can't find anything else
or
are you saying those are the nickels key dates and can't find info on what the keys are for the others?
Pillar of the Community
United States
2811 Posts
 Posted 12/28/2012  10:58 pm  Show Profile Bookmark this reply Add yotie to your friends list Get a Link to this Reply
Dimes I aint gonna be much help but silver roosies are all keepers and the 96W would have to be the key to the clad issue

and for cents 70S small date and the 60P small date might be considered key dates more like key varities
Valued Member
United States
67 Posts
 Posted 12/29/2012  12:31 am  Show Profile Bookmark this reply Add msteele to your friends list Get a Link to this Reply
door #2 Fuzzy. info on the key dates has eluded me

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United States
6842 Posts
 Posted 12/29/2012  12:38 am  Show Profile Bookmark this reply Add Fuzzy317 to your friends list Get a Link to this Reply
I have never used it, but I think the Cherrypickers Guide has lists
Some else should have more info. What I can remember for LMC: 1960 small and large dates, 1970 small and large dates, there are some 1995 DDO (if I have the year correct)
Edited by Fuzzy317
12/29/2012 12:40 am
Pillar of the Community
United States
3212 Posts
 Posted 12/29/2012  04:06 am  Show Profile Bookmark this reply Add murrellington to your friends list Get a Link to this Reply
For memorial cents there aren't really any key dates, but there are a ton of varieties that can fetch good money. The lincoln searching thread has people who find a lot of nice varieties.
Pillar of the Community
United States
3225 Posts
 Posted 12/29/2012  10:32 pm  Show Profile Check smokeriderdon's eBay Listings Bookmark this reply Add smokeriderdon to your friends list Get a Link to this Reply
I can not for the life of me remember who posted this, nor can I find the threads. But this member had a great system for sorting out the key dates. This is the original post that I copied for reference...

My little project for the day. This may have been done before, but I'd like to present my findings. I looked at mintage figures for the Lincoln cents 1909-2010. I divided them into the two traditional groups: wheats (1909-1958), and modern (1959-2010). I am not including varieties such as 1955 DD, 1960 small date, etc., since these have no specific mintage figures.

I took the log (base 10) of the mintage figures and determined their statistical z-score. (The log value gave, in my opinion, more realistic z-score distributions than using the raw mintage figures.) The z-score is a measure that tells how many standard deviations it is above or below the mean. Key dates would have very negative scores. What I was trying to do is to see what z-scores are for the traditional key dates and then compare these values to the more modern cents.

Here are the results for the LWC:
1909 S VDB -3.07 key
1931 S -2.71 key
1914 D -2.51 key
1909 S -2.25 key
1924 D -2.05 semi-key
1911 S -1.76 semi-key
1914 S -1.74 semi-key
1912 S -1.70 semi-key
1931 D -1.70 semi-key
1926 S -1.69 semi-key
1915 S -1.65 semi-key
1910 S -1.51 semi-key
1913 S -1.50 semi-key

I used the definitions of key and semi-key from http://www.lincolncentresource.com/index.html

Using the cutoff value for a key date to be -2.2 or smaller and a semi-key between -2.2 and -1.5, I then determined the following for the modern cents and used this definition to label them as key or semi-key:

(1959-2010):
1968 S -3.12 key
1973 S -2.87 key
1972 S -2.65 key
1974 S -2.55 key
1971 S -2.24 key
1969 S -2.20 key
1960 -2.10 semi-key
1962 -2.06 semi-key
1959 -2.06 semi-key
1970 S -1.90 semi-key
1961 -1.79 semi-key
1963 -1.79 semi-key


It is interesting to note that WITHIN these groups, the 1968 S is comparable to the 1909 S VDB! You can make similar comparisons between the groups, such as the 1974 S is very comparable to the 1914 D.

I know this is a long read and there are many interpretations, but I thought this was interesting. I also felt is was important to have the two groups of data span about the same number of years. I also know there are other variables to consider to determine what is a key date.

Finally, there has been talk about how low mintage the 2009 cents have been. Here are the results of these:

2009 P -1.32
This compares best with:
1923 S -1.29


2009 D -1.17
This compares best with:
1932 D -1.17

Here's the 2009 breakdown:
2009 P4 -3.05
2009 D4 -2.63
2009 P1 -2.26
2009 P3 -2.16
2009 D3 -2.10
2009 D1 -2.05
2009 D2 -2.02
2009 P2 -1.98


He followed that with this for Jeffersons...


Here are the results for the 1938-1963 Jefferson nickels (sorted by z-value). I have listed the "top 10":

1950-D -2.49
1939-D -2.24
1938-S -2.10
1938-D -1.85
1939-S -1.67
1951-S -1.52
1955 -1.47
1949-S -1.32
1950 -1.31
1948-S -1.19

Generally, the top 5 have been considered to be "key dates", but in comparison to the Lincoln wheat cents, perhaps only the top 3 are "key dates" whereas the 1938-D, 1939-S, and the 1951-S should be considered as "semi-keys". Just my opinion.

Here's where it gets interesting. With the more modern nickels (1964-2009) here are the results (again the "top 10"):

2009-P -3.58
2009-D -3.34
1968-D -2.33
1968-S -2.14
1971 -2.09
1967 -2.08
1969-S -1.88
1965 -1.72
1966 -1.52
1975 -1.29

Let me reiterate this... THIS IS NOT MY WORK I am only posting what someone else did. Hopefully whoever this was will see this and I can make a note.
"Our lives are summed up by two dates separated by a dash mark. Make the most of that dash." Battalion Chief John "Mac Daddy" McDonald. R.I.P.

It is could've, would've or should've, not could of, would of or should of.
Pillar of the Community
United States
1219 Posts
 Posted 12/30/2012  01:48 am  Show Profile Bookmark this reply Add ninamason to your friends list Get a Link to this Reply
1968-S is a key? Man, where is all my money then? I have a BUNCH of these in AU and UNC!
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United States
3212 Posts
 Posted 12/30/2012  03:12 am  Show Profile Bookmark this reply Add murrellington to your friends list Get a Link to this Reply
I think with moderns, there aren't really any keys for the most part, so the lowest minted coins become more or less the "keys" to the series. Maybe in a hundred years they will be real keys, but for right now not really.
Pillar of the Community
Russian Federation
819 Posts
 Posted 12/30/2012  11:05 am  Show Profile Bookmark this reply Add january1may to your friends list Get a Link to this Reply

Quote:
I think with moderns, there aren't really any keys for the most part, so the lowest minted coins become more or less the "keys" to the series. Maybe in a hundred years they will be real keys, but for right now not really.


This very much.

I like to claim (as a joke more than anything) that I have AU-MS examples of the lowest mintage business strike cent since 1940, and the lowest mintage business strike cent since that last one. That happens to be 1955-S (~46 million) and 2009(4)-P (~129 million) respectively
(In case you wonder: the 2009 coin was given to me by my uncle (who presumably found it in circulation) when he visited me in early December 2009*; as for the 1955 coin, the high-grade version was a gift from a fellow CCF member, but I previously received a XF example from my non-collector friends that was likely also a recent circulation find.)
Anyway, neither appears to be valuable, despite being relatively uncommon; the 1955-S might well never be (stuck as it is near the end of a series with lots of much rarer coins early on).


*) which also led to an obvious joke of it being the first coin of its type in Russia... probably not, but either way it couldn't have circulated for more than about three weeks!
Pillar of the Community
United States
983 Posts
 Posted 12/30/2012  10:09 pm  Show Profile Bookmark this reply Add ratio411 to your friends list Get a Link to this Reply
I forgot which it was, but one of the non-silver 42 nickels is a tough one.
High value in unc condition for whatever reason. Circulated it is nothing special.
Pillar of the Community
United States
3225 Posts
 Posted 12/31/2012  01:41 am  Show Profile Check smokeriderdon's eBay Listings Bookmark this reply Add smokeriderdon to your friends list Get a Link to this Reply
Nina, being a key does not automatically mean valuable for moderns. Remember, that is key in relation to the rest of the moderns, not in relation to the wheats. That's why he divided them up. rellington h. They are worth holding onto in high grades with an eye to your grand children benefiting.
"Our lives are summed up by two dates separated by a dash mark. Make the most of that dash." Battalion Chief John "Mac Daddy" McDonald. R.I.P.

It is could've, would've or should've, not could of, would of or should of.
Pillar of the Community
United States
3212 Posts
 Posted 12/31/2012  04:50 am  Show Profile Bookmark this reply Add murrellington to your friends list Get a Link to this Reply
Oh and I agree on getting some modern keys in high grades at a relatively low price. Our grandchildren like smoke said will really be thankful.
Pillar of the Community
United States
1219 Posts
 Posted 12/31/2012  1:44 pm  Show Profile Bookmark this reply Add ninamason to your friends list Get a Link to this Reply
Smoke, I figured. Hoped it would be a funny joke but apparently I sounded too serious!
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