Stamped 2630. Also has stamp "B.S.1" and "NL" metal channel is 27" long
Tom from SWISCO responded:
September 13, 2022
Hello! Your balance appears to be a match for our S350-27. This has a 19-002 top and 15-004 bottom nylon fitting. As long as those match then I think this will work perfectly well as a replacement.