dasnake
Member
Great
Thanks a lot, take care.
A 5906 is a 3rd gen model.
A square trigger guard was used on the early production 3rd gen pistols.
Square trigger guards generally date 3rd gen pistols to the late 1980s, but you never know with S&W.
I think you can still call or email them with your serial number and they can tell you when it shipped.
John
Thanks a lot, take care.