Is this just overly aggressive die polish? Or die erosion? Or planchet issues?
For a quarter that is otherwise rather well struck, the date on this SLQ is nearly missing at the top. The reverse show some weakness as well, but nothing like the obverse.
I do like this coin, bu I do not own it. It is currently in Northeast's inventory marked as "sold".

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IMHO looks like struck though grease on the date
coins for sale at link below
https://photos.app.goo.gl/nsHQNq5HMDcCrpHm8
Agree. That was my first thought as well.
Thanks to you both.
After magnifying the picture, and being able to 'read' the date, even in the weak area, I agree with the grease filled die opinion....Interesting coin... Cheers, RickO