Is it a trap gun?

[Duckman]

I recently acquired a DHE with 32" barels and am wondering if it was originally a trap gun (I got it for ducks) or if there is any way to tell. Gun has a very straight stock for the time, 14 1/4 x 1 1/2 x 2 1/4, ser #229740. Has two white beads that are not yellowed with age so might not be ivory, safety is non-automatic which someone may have changed? I am not sure if a non-automatic safety was an option. Gun appears all original with the exception of a new Silvers pad which may replace a deteriorated factory pad. Barrel blue and wood finish look original and pretty good for the guns age. Action has been cleaned and is silver but done well and engraving is very sharp and nice. Gun is tight as a new one. Would a letter tell me anything? I really like this one!
Thanks for any info.