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2 1979 SBA Coins Different Sizes And Images

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Pillar of the Community
United States
1657 Posts
 Posted 03/23/2026  4:56 pm  Show Profile   Bookmark this reply Add lcutler to your friends list Get a Link to this Reply
I don't think there is anything there to make them worth more than face value.
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jbuck's Avatar
United States
188440 Posts
 Posted 03/23/2026  5:15 pm  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply
I agree, not worth grading. The size difference though, I am still not sure what caused it.
Valued Member
United States
60 Posts
 Posted 03/23/2026  7:17 pm  Show Profile   Bookmark this reply Add Vanillacake to your friends list Get a Link to this Reply
Thank you all for the time and replies. But can someone help me understand what I'm missing with the size/rim/and face being not at all the same?
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Dearborn's Avatar
United States
95984 Posts
 Posted 03/23/2026  7:33 pm  Show Profile   Bookmark this reply Add Dearborn to your friends list Get a Link to this Reply
if the reeded edge of one of the coins is worn slightly, then of course it will be a teensy fraction of a mm smaller.
These two coin are simply unremarkable and not worth the price tag of getting them graded.
Pillar of the Community
United States
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 Posted 03/24/2026  03:34 am  Show Profile   Bookmark this reply Add lcutler to your friends list Get a Link to this Reply
A worn or damaged collar can cause coins to be slightly larger than normal. As far as the other issues you mention, many things can cause slight differences in coins, striking pressure, die wear, die polishing, circulation damage, I don't see anything significant.
Edited by lcutler
03/24/2026 03:35 am
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Petespockets55's Avatar
United States
5774 Posts
 Posted 03/25/2026  07:34 am  Show Profile   Bookmark this reply Add Petespockets55 to your friends list Get a Link to this Reply
Maybe it's me, but the reeds seem to be wider on one coin, and the spaces wider on the other. Hmmm...
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jbuck's Avatar
United States
188440 Posts
 Posted 03/25/2026  09:49 am  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply
I can see that. I wonder if the smaller coin was struck with slightly less pressure and did not fully form in the collar? Or, the larger coin was struck with a worn collar?
Valued Member
United States
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 Posted 04/11/2026  09:07 am  Show Profile   Bookmark this reply Add Vanillacake to your friends list Get a Link to this Reply
Any additional information? What should I do regarding getting these verified?
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JimmyD's Avatar
Canada
21608 Posts
 Posted 04/11/2026  10:20 am  Show Profile   Bookmark this reply Add JimmyD to your friends list Get a Link to this Reply
Not sure what you want verified. Everyone agrees that
one coin is slightly smaller but there are many reasons
that can happen. Perhaps the grooves on one collar was
slightly smaller than on another collar but it is so minute
that it would have no significance. A grader is certainly
not going to measure it with calipers to see if it is smaller.

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HGK3's Avatar
United States
572 Posts
 Posted 04/11/2026  12:10 pm  Show Profile   Bookmark this reply Add HGK3 to your friends list Get a Link to this Reply
Perhaps I'm missing something, but the photos posted measuring the coins with the micrometer show both coins are the same diameter and are the correct diameter.

Reading from 0 to the 0 on the millimeter scale (to account for a slight offset of the calipers) gives a diameter for each coin of just more than 26 millimeters.

Since the correct diameter is supposed to be 26.5 millimeters, allowing for minor differences in either striking pressure or due to inaccuracy of the micrometer your coins are identical and within US Mint specs.
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Chase007's Avatar
United States
7510 Posts
 Posted 04/11/2026  6:51 pm  Show Profile   Bookmark this reply Add Chase007 to your friends list Get a Link to this Reply
These coins are identical in diameter with one being darker due to environmental toninig or whatever the cause may be, but it did not come out of mint looking this way.. And there's no noticeable differences on the Nose.



2-1979-SBA-Coins-Different-Sizes-And-Images
2-1979-SBA-Coins-Different-Sizes-And-Images
And I think we need to move on............
Edited by Chase007
04/11/2026 6:56 pm
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Dearborn's Avatar
United States
95984 Posts
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Jim0815's Avatar
United States
5239 Posts
 Posted 04/12/2026  08:28 am  Show Profile   Bookmark this reply Add Jim0815 to your friends list Get a Link to this Reply
It appears as if one coin were struck with a newer, fresher die.
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