Beretta 92sb proof stamps

[Sww07]

Does anyone have any information as to what these proofs of stamps mean on the trigger guard? I did a little research on Google but can’t seem to find much. My neighbor passed away and his wife sold me his firearm collection. This beretta is a really smooth shooting gun and my groups were very tight at 10-15 yards

 

[Colt1957]

Price? And location please

 

[Sww07]

Price? And location please

I’m not sure it’s for sell honestly I just got it two months ago and took it to the range just once. It’s a fine gun. I’m just inquiring info on what the stamps might be if there are of any significance? From all I could research the gun brings around $930 +/- but I could be wrong. Located in Powder Springs

 

[StuP]

They look like italian proof marks ?

 

[cmshoot]