Marvin Balancer 62MB-20B

Thanks for posting. Can you show us pictures of your balance, including any stamp code on the metal channel? We'll see what we can determine from there.

Balances are really only identified by visuals; stamp codes typically only refer to the calibration of the balance's spring strength. Without seeing the original balance, I'm afraid it's pretty much impossible for me to say what you need; there's just nothing to go on here. The code you're referencing seems a little odd to me anyways--it's certainly not one of the normal stamp options that accompany our standard channel balances. Chances are if this were a channel balance we'd have to end up asking you to weigh the window sash that this balance is meant to support in order to determine the proper spring calibration. But all that aside, without being able to identify the balance visually, I'm afraid we simply can't tell you what kind of balance this is. Sorry that we cannot be of more help.