Yes, Tracy...
Mine is a '41 byf BW...I do not recall the serial number and am hoteling it this week again. But the serial number is squarely in the range when BW plastic grips appeared....
My BW is E/655 proofed and I think the magazine is E/37 stamped as well...
Regards,
Pete... <img src="graemlins/yltype.gif" border="0" alt="[typing]" />