Channel Balance

Thanks for posting. Stamp numbers actually only tell you how strong the spring is, it is not a part number. I recommend looking at our Series 380 channel balance for a possible replacement and see if the nylon attachments match. Keep in mind your shoe may have worn down over age, which would account for a depth of 7/8", not 1". Even if your original shoe depth was 7/8", you could file down the Series 380 shoe if necessary. They do not make a shoe in this style that has that size so that may be your only option.

Please also confirm the weight of your sash. 50 pounds is a lot! Plus, your stamp of 3440 is only meant for sashes that weigh 23 through 30 pounds. If your sash was 50 pounds, these balances would never have been able to support that kind of weight. Please double check.

As for the top sash guide, see our 18-161.