This is the rifle that inspired me to join this forum. I have a few other Marlins, but this is definitely my oldest. I have read on some forums that a B serial number prefix indicates 1941 production, but other information suggests that it would be 1936-37. I would like to learn as much as possible about this gun, so any input you have will be appreciated. The serial number is B4***. The pictures tell the rest. Thank you!