Admiral Gardner Shipwreck coins

I've seen several of these and the thickness is 1.2mm.
Catalogue lists it as 2mm.
What am I missing?
Thanks
https://en.numista.com/catalogue/pieces42953.html

Citação: "Kurt53"​I've seen several of these and the thickness is 1.2mm.
​Catalogue lists it as 2mm.
​What am I missing?
​Thanks
​https://en.numista.com/catalogue/pieces42953.html
​
​

​I don't believe the catalog has the correct diameter. IMO in many cases the value provided is just a guess.

you mean this one



well mind looks to have been sealed. I think it will break if I try to open.

This might be the thick one.https://en.numista.com/catalogue/pieces4090.html

Citação: "ALLRED1950"​you mean this one
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​well mind looks to have been sealed. I think it will break if I try to open.
​

​I got mine open last year. Very difficult. I'm getting out my calipers now...

1.26mm

Thank you jimpop I did not want to try opening mine. It was a X-mas gift from last year from a good friend. We should let the catalog know the thickness may be wrong in our catalog.

Comparing KM# 319 with KM# 320, the ratios of thicknesses doesn't exactly match the ratio of weights.
And one of the coins I examined appeared to be an incomplete casting.
Any thoughts?

Here is the pertinent page from the 4 edition of KM.

Thank you Beekeeper and welcome to the site.

Thanks Beekeeper.
I usually borrow a copy of the Krause book from the library, but broke down and ordered one of my own. Just not here yet.
What I gather so far is that we may need to update out catalogue.
But that still leaves the question of counterfeits.
I contend that my examples looked like unfilled castings.
Any one see similar evidence on their coins?