Thanks. I bought my first model 880 in 1973. Back then the 880 had a smooth bore and the 881 was rifled with “Decca rifling” whatever that was.
They later dropped the 881 and put a rifled barrel in the 880.
The quality of the parts seems to have dropped a little but it appears to be basically identical to the 1973 model.
I bought my latest one at Wal-Mart for $44 which included a really cheap 4X scope. The scope does actually work tho. It can’t compare to my Diana RWS model 48 springer but for the money it is a heck of a lot of performance.
I had a 880 around 1976.