channel balance

A handy person from FL says:
Item is stamped Unique
28-c-30
4-21-96
not sure if it is 28 or 20
measures 29" metal
u channel is 1/2" wide
bottom end measures 1" of plastic on flat side of channel
top plastic is 1 1/4" showing on U side of channel
wings of plastic is 1" wide
Thumbnail of the uploaded file named 20191230_115819.jpg
Thumbnail of the uploaded file named 20200102_113027.jpg
Thumbnail of the uploaded file named 20200102_113042.jpg
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Bob from SWISCO responded:

Thanks for writing in. See our S380-29 or S385-29. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old hardware to see what matches best. I believe you have the S380-29, which has a shoe depth of 1"; but best to double-check to be safe. You will need a stamp option of 2830. 

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