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 Replies: 10 / Views: 1,882 |
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Valued Member
United States
71 Posts |
What Variety of RPMM is this? And is it significant? Sorry the coin is a bit dirty.    |
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Pillar of the Community
United States
3644 Posts |
Nice find! Looks like 1MM-001 I just found one of these couple months ago
Edited by Slamnbass
01/09/2016 01:57 am
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Valued Member
 United States
71 Posts |
Thank you! I had the pleasure of finding this and many others in an unsearched lot.
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Moderator
 United States
56855 Posts |
If I was you I would take it out of that 2x2 and give it a VERY gentle cleaning with a VERY soft toothbrush and put it in a new 2x2. Nice find. (P.S. Not sure about it being 001 but it does look like an RPM. I think I see three MM's.) John1  Edited by John1
01/09/2016 04:50 am
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Valued Member
United States
71 Posts |
I was thinking the same thing but I might go with just an acetone bath to be safe. I'm sure a toothbrush would be ok if I was careful, but I'm overly cautious. I just gave this coin an acetone bath and it seemed to come out ok. https://goccf.com/t/250069Also, if you're thinking it has 3 MM's I might have to recheck it under the microscope after a slight cleaning. I'd like to hear your thoughts on that. |
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Moderator
United States
56855 Posts |
Your link shows a 31-S ? John1 |
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Pillar of the Community
United States
2253 Posts |
Hit my older RPM's with a brush all the time. Doesn't seem to hurt them. I wouldn't use one on a coin that was in good shape or uncirculated.
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Bedrock of the Community
United States
62064 Posts |
It is 1956D-1MM-001. Just a collection of gunk on the mint mark. I always use mineral oil. It helps to loosen the grime without altering the color of a coin. If it is thick on the devices, let the coin soak for a longer time. Then use the tooth brush to push towards the devices.
(keep in mind that grime may contain grit like sand. This will scratch the field if you are not careful. Best to experiment on a normal coin until you get the technique down)
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Valued Member
United States
71 Posts |
It is indeed a 31-S  I'll give the coin a once over today with acetone and go from there. I'm very tempted at this point to pick up some Verdi-Care, I've gotten a lot of suggestions for that! Edited by wbarkley
01/13/2016 12:18 pm
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Valued Member
United States
71 Posts |
I touched it up a bit with some acetone. This is the clearest picture I could get of it.  |
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Valued Member
United States
71 Posts |
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Replies: 10 / Views: 1,882 |
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Posted 01/09/2016 02:00 am
