Guessing Series 395 28" and 29", but let me know if you have a different opinion! I have 28" and 29" units to repair.
Tom from SWISCO responded:
June 26, 2018
Nope, my opinion is the same as yours! S395-29 with a 2850 stamp option is what you're showing in this photo. If you have different balances, measure the channels to get the proper lengths.