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All Forums Category: US Coins and Currency Forums Forum: US Modern Variety and Error Coins

1966 Quarter Weight Error

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Ame1979
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 Posted 02/17/2026  1:58 pm Show Profile   Bookmark this topic Add Ame1979 to your friends list Get a Link to this Message Number of Subscribers
This is my 1966 quarter. I find it very unique for its weight is not the normal weight of a quarter. This 1966 weighs 4.2g. Is it worth keeping?
1966-Quarter-Weight-Error
1966-Quarter-Weight-Error
1966-Quarter-Weight-Error
Errers and Varietys
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 Posted 02/17/2026  2:06 pm  Show Profile   Bookmark this reply Add Errers and Varietys to your friends list Get a Link to this Reply
It was probably struck on rolled thin Planchet. Nice find! https://www.error-ref.com/rolled-thin-planchets/
Errers and Varietys.
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mikediamond
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 Posted 02/17/2026  2:12 pm  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
Struck on a planchet derived from dime stock. Dime stock quarters are known from many years, including 1965, 1966, and 1967.
Error coin writer and researcher.
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Errers and Varietys
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 Posted 02/17/2026  2:51 pm  Show Profile   Bookmark this reply Add Errers and Varietys to your friends list Get a Link to this Reply
I was wrong. Thank you, Mike for stepping in.
Errers and Varietys.
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Ame1979
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 Posted 02/17/2026  4:04 pm  Show Profile   Bookmark this reply Add Ame1979 to your friends list Get a Link to this Reply
Thanks for the info. Appreciate it.
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smat45
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 Posted 02/17/2026  4:13 pm  Show Profile   Bookmark this reply Add smat45 to your friends list Get a Link to this Reply
Cool!
Just for prospective purposes...
Can you give us a clear pic of a regular Quarter next to it rim to rim?
smat
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jbuck
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 Posted 02/17/2026  4:34 pm  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply
Very nice!
Coin Collector Since 19781966-Quarter-Weight-ErrorAvatar1966-Quarter-Weight-ErrorOld Avatar1966-Quarter-Weight-Error70701966-Quarter-Weight-ErrorEisenhower1966-Quarter-Weight-ErrorAustralia1966-Quarter-Weight-ErrorCanada1966-Quarter-Weight-ErrorWorld1966-Quarter-Weight-ErrorCCF Members on eBay1966-Quarter-Weight-ErrorCCF eBay Search Engine
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Dearborn
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 Posted 02/17/2026  5:11 pm  Show Profile   Bookmark this reply Add Dearborn to your friends list Get a Link to this Reply
Thanks Mike for your input - I was thinking that myself just before I scrolled down to your post.. (I have one of these )
Collecting since 1972. Learning from then on
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ijn1944
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 Posted 02/17/2026  5:43 pm  Show Profile   Bookmark this reply Add ijn1944 to your friends list Get a Link to this Reply
Would love to see a side-by-side photo as noted by smat45. Thanks.
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Ame1979
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 Posted 02/22/2026  10:09 pm  Show Profile   Bookmark this reply Add Ame1979 to your friends list Get a Link to this Reply

1966-Quarter-Weight-Error
1966-Quarter-Weight-Error
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jfeed
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 Posted 02/22/2026  10:42 pm  Show Profile   Bookmark this reply Add jfeed to your friends list Get a Link to this Reply
Fantastic find
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Ame1979
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 Posted 02/22/2026  11:14 pm  Show Profile   Bookmark this reply Add Ame1979 to your friends list Get a Link to this Reply
Thank you
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Marv65
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 Posted 02/22/2026  11:25 pm  Show Profile   Bookmark this reply Add Marv65 to your friends list Get a Link to this Reply
Great picture!

1966-Quarter-Weight-Error
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Ame1979
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 Posted 02/23/2026  02:14 am  Show Profile   Bookmark this reply Add Ame1979 to your friends list Get a Link to this Reply
Thanks @ Marv65
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Brandmeister
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 Posted 02/23/2026  10:39 am  Show Profile   Check Brandmeister's eBay Listings Bookmark this reply Add Brandmeister to your friends list Get a Link to this Reply
Outstanding find. You can see that the devices near the rim didn't strike well because there wasn't enough metal and pressure to fill the dies.

Did you notice something unusual about the quarter visually? Or do you just weigh all your quarters?
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Ame1979
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 Posted 02/23/2026  11:01 pm  Show Profile   Bookmark this reply Add Ame1979 to your friends list Get a Link to this Reply
Thank you all
@brandmeister at first I notice the sound. When it clinks agaainst another coin it sounded like a silver coin. Then the weight became obvious so I decided to buy the scale to weigh it.
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