Bob from SWISCO responded:
September 15, 2020
My guess would be that one of the balances was replaced at some point; these stamps technically are the same (3130, or 31-3, is the same in weight ratings as 31C). This balance appears to be either an S351-32 or S390-32, depending on the depth of the bottom nylon shoe. Compare both with your old hardware to see what matches best. You can choose a stamp option of 3130. |