RWTF, I used to own a Victor Sarasqueta 20 gauge that very much resembled the gun you describe. It had the same small BTFE, PG, DT, etc. Mine was called a Woodland Zephyr IIRC. It had minimal engraving and plain wood with a checkered butt. I had the IC barrel opened to cylinder for use in close cover, and the gun performed quite well for that purpose.

I have long enjoyed Mr. Hemingway's work, but know nothing of his guns (other than "the little Mannlicher"). I do hope you enjoy yours.

Caution: Hunting and fishing stories told here. Protective footgear may be required.