I have an update on this particular 686-3...I met with the dealer at the gun show last weekend and bought it. Fortunately it does have the scarce original Millet rings, and the original Combat stocks (dated April 1? 1989). Sadly, no box. It was bought to shoot anyway. It came with a Simmons 1x20 scope.
The rings are obviously different from the currently available Millet rings, but nothing like the rings that have been posted in an older thread (see post #33)
Help! Integral Scope Mount Rings?
Anyways...if you have this particular model 686 and you're searching for the rings, the type on the right is what you need..