Canadian Blank ? - Coin Community Forum

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Author	Replies: 4 / Views: 2,096
Indian1 Pillar of the Community United States 3640 Posts	Posted 06/17/2011 7:20 pm I posted here because I thought that this blank may not be of U.S. origin. Reason being is I found it mixed in with some other coins that my step dad had in his collection of both U.S. and Canadian coins and the fact that he was french canadian. Anyway, weight is 2.4 grams, diameter is 18.8 m.m., thickness is 1.5 m.m. The image is a scan and the actual color of the complete coin on both sides is the same as the southern edge of it. It is unc. and very nice copper color. There is no raised area on either surface of the blank (that's why I did not call it a planchet) near the rim but there is a raised and recessed ridge around the outside edges with kind of a gully (concavity) in it. You can see the slight raised area in the image. The concavity is centered along the outside edge perimeter. Closest one I could find that matched the specs. was a 1982 - 1996 copper 12 sided as far as canadian small cents go. Sounds strange to me as I have no idea if the 12 sided coin is collared like it is or if it was shaped during the stock punch. not a big deal blank/planchet anyway but curios and any help would be appreciated. Thanks. Report this Post to the Staff

Wild Bill Pillar of the Community United States 744 Posts	Posted 06/18/2011 6:29 pm as we know the US copper plated zinc cent 1982 to present has a weight of 2.5 grams and a diameter of 19mm the Canadian copper plated zinc cent from 1983 to 1996 also weighs 2.5 grams with a diameter of 19.1 mm IMHO I think that what you have here is a type 2 (planchet) not a type 1 (rim-less blank) I have read somewhere that the Royal Canadian Mint contracted the United States Mint in Philadelphia to strike a certain amount of cents.....the amount I don't recall, but in closing....I feel it would be impossible to determine if the planchet had US origin or Canadian...... Edited by Wild Bill 06/18/2011 6:34 pm Report this Post to the Staff
dialog_gvf Pillar of the Community Canada 1581 Posts	Posted 06/18/2011 9:03 pm The 12-sided was collared. That means the planchet must fit in the collar for striking. Hence, the smaller diameter (18.8 mm versus 19.1 mm for a struck coin). Wild Bill: AFAIK the RCM has only used the US Mint once for striking: The 1968 nickel 10c run was half-produced in Philly. But, they've sourced blanks from US companies constantly. For the last few years the business 1 cent strikes have been using US plated zinc-core blanks, instead of the RCM's patented steel-core. Probably because the US meltdown has made the price of those blanks too good to pass on. Report this Post to the Staff
Bowfin Valued Member United States 296 Posts	Posted 06/18/2011 10:54 pm Couple of questions. 1, Have you determined what the composition is? 2, How did you weigh it? The '83 through '96 Canadian cent is copper and weighs 2.5 grams. The '97 and up cents if they are zinc weigh 2.25 grams. The '00 and up steel cents weigh 2.35 grams. Up through '96, the RC mint gave a Weight Tolerance of ±.02% I do not know for the newer coins. Up through '82, the U.S. mint had a Weight Tolerance of ±.12 grams. Again, I do not know about the newer coins. You stated your planchet weighs 2.4 grams. Does your scale go 1 or 2 places to the right of the decimal point? Assuming both mints kept the same tolerances for the newer coins.., If it is zinc, a Cdn planchet could weigh as much as 2.295 (± .02%) grams. A U.S. planchet could weigh as little as 2.38 (± .12) grams. If it is steel it could weigh as much as 2.397(± .02%) grams. If your scale only goes to tenths, it will be rounding up or down. If a magnet sticks, I would say it could be Canadian, if it doesn't, I would say it could be U.S. Or I could be totally wrong. Report this Post to the Staff
Indian1 Pillar of the Community United States 3640 Posts	Posted 06/19/2011 3:38 pm Weighed on my jewelers scale. Pretty accurate but only to the tenth. Bounced a bit between 2.3 and .4 but then settled down at 2.4 Non magnetic. Compositon is a guess because of the color and the fact that no zinc etc. is showing through the ridges/channel around the edge perimeter that were formed/cut into it. I also posted it over at the U.S. variety/error forum. Wish I could draw an accurate picture of the outside edge. Never saw this effect on any blank. Best description: 1. Both surfaces (both sides) smooth all across the faces. No upset to form a raised rim/edge. 2. Using a fictional size of 1" on the coins thickness and looking at it as it is standing up on edge. A groove formed/cut 1/4" in on both sides. Then a 1/2" wide gap in between that resembles a trough, indent ( you shaped ) The 1/4" cuts are then raised to make the final diameter of the blank as stated earlier. Adding a total of about 1/2 of a m.m. (actual) to make up the final diameter. If it was, lets say a normal U.S. blank then the edge would be sort of rounded around the perimeter but smooth. So with this weird edge that would add at least one 1/2 of a m.m. to the overall diameter of that coin. That's about the best way I can explain how it looks under 10X Report this Post to the Staff
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