Originally Posted By: ellenbr
I'd hazard a guess it experienced proof in 1959.


Kind Regards,

Raimey
rse

You may be right. The "59" beneath the nitro proof is the only thing I see that resembles a date code. It would make sense since I've read that the Model 54 (if I'm correct on the model) was manufactured from 1954-1988.

At this time I don't know that the "B W" means, found above the preliminary proof: