This one has me stumped...?

[Jerry VanHorn]

Bought this gun from a collector out West. Saw a lot of pictures...and the price was right..In readying to do a good cleaning, I noticed this...Gun is 223469..In book as 28" 16 ga. Trojan.Receiver and FE numbered. Varnish looks original..Has a DHBP instead of a plain Trojan BP..but it looks like it's been there forever. NOW...Barrels have no serial number on the flats..Has 16 and 1 on the lug. Has correct stamping on top rib. Bores are like new. Both flats are stamped..Parker Bros. Overload Proof..has GV stamp on right flat..3/5 barrel weight..and HT over an A.?? Then on the bottom rib, just ahead of where the forend wood ends..16ga BV or BY ? (Hard to tell)..Lynden Wa. Screws are like new..barrel blue is 95+. Traces of color..I know the seller, and I'll bet he never saw the stamp on the rib...Any guesses ??...Chokes are tight full and IM..