Crosman Estate sale find

Picked up this little beauty at an estate sale this morning. In like new condition and works perfectly. My lucky day.

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2nd variant, I see a rounded tang and grove, either way very nice :)
Still considered a first variant. Not an 1st “A“ (square tongue on the receiver but a 1st “B“ (round tongue on the stock ). This is how the collectors differentiate the two. Crosman categorizes them both as just a 1st variant.