Does it have more or less the normal engraving, just "S-1" not engraved?
I expect these were all done by hand, so an error is not unheard of. Somewhere there's a photo of a Conn 10M engraving in which the "lady" in the pentagon is upside down!
I expect these were all done by hand, so an error is not unheard of. Somewhere there's a photo of a Conn 10M engraving in which the "lady" in the pentagon is upside down!