Thanks for getting back to us. Yes, it sounds like you have the
Series 385 channel balance. I would not recommend the
S385-32, however; based on your stamp, your channel might be 33" long. Measure your metal channel and let me know what the length is. Please do
not include the plastic attachments in your measurements, just the metal channel.
I would do the same with the smaller balance, as well.
As for the option, I would think you'd need the 3230--again, this is based on your stamp. Compare the weight rating for the 3230 on the
S385-33 page and see if it matches your sash weight. It's always best to double check your measurements and sash weights just to make sure everything is correct. Stamps alone cannot decide what you need.
The
Series 385 channel balances come with the top and bottom attachments already attached.