1942/1-P Mercury Dime Reverse

Good question.

I don't think there's a definite answer, we know that 1941 was accidently hubbed with a 42 working hub on the obverse. How many reverse dies made for the 205+ millions impressions? So I guess it would have used on many non 42/41 P Mint, like many collectors, I would check the important of the date only, and didn't bother with the reverse.

I for the past few years searching for varieties would have check the whole coin.

Here's the coin in question...

It isn't the 42/1 that is obvious. As to whether or not the reverse used for the 42/1 was paired with another obv die I do not know, and I am not familiar enough with the rev die markers for the 42/1 to know if that is the same rev or not.

Die life was somewhere between 300 and 500 thousand coins per die so they would have used between 400 and 700 rev dies.