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SMS coins inconsistent in finish?

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Valued Member
United States
56 Posts
 Posted 03/12/2018  9:06 pm Show Profile   Bookmark this topic Add ThreeLui to your friends list Get a Link to this Message
How come some SMS coins look proof, while others look mint state? Aren't all of them made from the same process? I don't see my proof sets looking like a mint state and vise versa, so why does this happen? What's causing these coins to look very different from each other if they are made identically?

Pillar of the Community
United States
630 Posts
 Posted 03/12/2018  9:11 pm  Show Profile   Bookmark this reply Add AlbumAccumulator to your friends list Get a Link to this Reply
The die states will make the coins look different. Early strikes should look closer to proofs. As the die wears, they will resemble business strikes. Also the planchet preparation and force used to strike the coins will contribute.
Pillar of the Community
United States
1610 Posts
 Posted 03/12/2018  10:30 pm  Show Profile   Bookmark this reply Add cladking to your friends list Get a Link to this Reply
They used a lot of different processes and techniques to mint these. There are about nine major types and probably dozens of subtypes.

The ugliest are 1966 quarters that look like they were struck by worn polished dies with polished planchets. They're very shiny and look like slugs.

My favorite are a sort of matte finish that appear to have been struck twice and are probably technically proofs. These are very scarce and may be a subtype that was simply struck twice.

I've never methodically studied the SMS but it would make an interesting project. The cameo versions are often very highly PL.
Time don't fly, it bounds and leaps.
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