Back in '87 I picked up an almost identical shotgun, then it was stamped "Special Purpose Deer" I never got a chance to try it out on deer but IIRC the targets were scared at 50 yards. Kept it until I went away to college and needed book money (I spent my book money on beer). Anyway it was one of a few 870's I've owned over the years and never had a bad taste with any of them.
Looks like a nice find.