I bought that 870 new in 1956. Best as I recall it weighed in at about 6 1/4 lbs. Quite certain the frame was not large enough to have been a 12ga one. What ever I simply did not shoot it anywhere near as well as my old J Stevens 12 ga double. Ended up trading them both off, wish I had kept the J Stevens, don't regret letting the 870 go nor do I have any desire for another.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra