What Dave said.
During the sixties, Simmons Specialties of Kansas City decided to offer their own branded shotgun and contracted with Savage/Stevens to convert a variant of the Stevens Model 311 20 gauge; stock 311 24" barrel, case colored receiver, and double triggers converted to a single trigger. Simmons would then install a vent rib with a "glow-worm" front bead. They ceased production in 1969.
Simmons also offered a Dakin Gun Co. "Quails Fargo" with 22" VR barrels choked Sk 1 / Sk 2 made by Gaspar Arizaga.