1908 Dime Double Sided But Reversed! Full Mirror Brockage

It weighs exactly 2.50 grams

So I think sending is the next step. Is ICG any good for something like this? Also not know the value what should I put down for value for insurance purpose?

glad you turned down the $150. that dealer knew he could flip it for a few thousand (if real).

Nice find if it turns out to be real. Need better pics and please crop,took forever and a day to load Send it to PCGS
John1

EDIT: Just sent e-Mail to Mike.

The fact that its weight is normal supports the idea that this is a genuine, in-collar first-strike brockage. I am, however, a bit concerned about the absence of reeding and the absence of finning on the obverse rim. The coin looks uncirculated or almost uncirculated and therefore the reeding should be quite visible. The extra striking pressure generated by two stacked planchets usually generates a finned rim. This error is a toss-up in my book. It needs to be studied closely. In the meantime it would be helpful to precisely measure the coin's diameter from north to south and east to west to see if the diameter is normal and the coin is not out-of-round.

1.7 inches equals 43.18 millimeters, which is larger than an Eisenhower dollar. If these are truly your measurements, then it cannot be a genuine error.

It should be closer to 1.8 centimeters (17.91 millimeters, to be exact). If the reeding was removed after the strike, that would account for the discrepancy, but why would anyone do such a thing? Of course, if the reeding had been removed, it would be lighter than 2.5 grams. Something's not right.

Wouldn't it depend on whether this coin was the upper or lower coin in the stack? If it is the lower coin and struck between the anvil die and a capped upper die I would expect reeding and finning. If it was the upper coin struck between the hammer die and a struck coin still in the collar I would not expect reeding and finning. (But I would expect an increased diameter from the higher pressure and lack of a restraining collar.)