This is a nice old gun. For what it’s worth, this is a standard grade Superposed Broadway. Broadway denotes the wide (5/8”) rib. I am not aware of any Broadway guns made before 1960. The square knob on the grip and wide forend suggests that this gun was made between the mid 60s and mid 70s. The serial number should be followed by either a single digit (2 thru 8) and an “S”, or by an “S” followed by two digits denoting the year of mfg (i.e. S71 would be a 12ga made in 1971 or 5S would be mfg in 1965).
It would be fantastic to see someone put this nice old girl back to work on the trap range! Thanks for posting.
JJ