I just treated myself to a Beretta S3EELL---it's an early 60's model. I'm amazed at the quality of engraving and workmanship that went into this sidelock over under. I never had the opportunity to inspect one closely. Shooting my little baby must wait for warmer weather.
I did some internet searching to see other similar guns and compare them. I see that SO series probably started in the 70's and both the S series and SO series may have been built in parallel for a while. I think the SO series has a modified lock design but overall they are very similar in appearance.
Can anyone share their experience and comments about these fine guns?
Bill