Thanks Bill! I just haven't pulled out my copy yet. I think I have many of the more easily available tokens and I get excited when I find one from a base I didn't already have.
Pulling this out of the flip to photograph I put a very small print in the field near the rim So I put it in acetone and it seemed to remove the print but now has some material dried on the coin. I need to soak in fresh acetone to see if I can get that junk off...
I had the opportunity to sort though 5000 German coins on the 12-13th. Where I found this. 23 mm, Alum alloy.
That is a good question, I would say they where not used on the ship but on the base at Okinawa. Mostly due to why they where used. https://www.rememberingokinawa.com/page/club_chits_tokens