Parker 16 ga questions ?

[C.O.B.]

A #1 frame 16 isn't a rare configuration in the Parker world. You didn't mention barrels length or stock configuration but my guess is it's a capped pistol grip splinter forearm double triggers. Straight grip guns in the lower grade are a little more unusual. I wouldn't hazard a guess as to value without good pictures but nothing beats having the gun in hand.

[Bill Murphy]

Your "3 weight" barrels are not a weight category. This stamping is the actual weight in pounds of the unstruck barrels. A smaller number stamped next to the pound weight would indicate ounces if the weight is not in even pounds.