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H-S only ever made one pumpgun - the Flite King.
The Flite King had different model numbers applied, depending upon the gauge & features. (over a dozen model numbers).
The ones H-S made & badged for chain stores (like Sears/J.C.Higgins, J.C.Penny, Western Auto, etc) had whatever model number the particular contract called for.
The J.C.Higgins Model 20 = The H-S Model 200 Flite King.
The "muzzle looking choke" is the once popular PolyChoke (or, perhaps an aftermarket Cutts Compensator).
Both the PolyChoke Co. & Cutts had contracts to install their adjustable choke device (PolyChoke) or muzzle brake w/choke tubes (Cutts) on the shotguns of several different factories - to satisfy the demand for a shotgun equipped with anything other than a single fixed choke.
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