BYF 41 grips and magazine

[warrantw3]

Hello,

I am new to the forum and would appreciate some much needed help. I have just purchased a BYF 41 with wooden grips and two alum bottom fxo mags. It has a bcb 41 holster and e/655 tool. The serial number is 4271x. I would rate it at 98% +.

The grips are marked on the inside with the last two digits of the serial number and also an "s".

One magazine has a matching serial number and the other is un-numbered.

Q1. Has anyone ever seen a "s" stamped inside BYF grips?

Q2. Should the BYF 41s (wooden grips) have been issued with one matching numbered and one un-numbered fxo magazine?

Thanks in advance for any help you can provide.

Jeff