I looked on gunbroker but my scope is 11 3/4" long not 9".
also according to the link above it is older than 1974, as it has no letter prefex on the serial# 431xxx
I took it off of a marlin 1894 357 (seemed like a waste of a good scope in that application)
and I prefer iron for a carbine anyway.
Good scope. Perfect for a Marlin .357 Carbine.