Winchester model 59, Winlite, semi-auto pre-1964 light weight, alloy receiver , low recoil shotgun. 12 ga 2 3/4" shells. modified choke.
made for short while, a bit ahead of its time with the barrel actually made of fiberglass wound around a steel inner barrel-- gives fast pointing, well balanced gun. uncommon gun but was popular for upland game and some competitive shooters.

this one is all original very good condition, the finish is excellent:

lightly engraved, and looks much nicer than my poor photos. 2011 gun values book says 550$ in vg condition and one just sold in cabelas for 575$

i got two of these in an auction a few years ago and i am keeping the one that is more of a 'beater'

asking 375$ on local forum here, but asking 350$ with priority mail shipping included to any one here