Unique 27-E-50 Channel Balance

A quick learner from Spring hill, florida says:
The block pulley broke on my channel balance. There is an ink stamp "(09/2)UNIQUE 27-E-50" on the back. The bar measures 28 inches long, is 9/16th wide, and is the plain design. Is the 770 28" Plain the correct bar to order?
User submitted picture of channel balance unique 27-E-50.
Profile picture of Donna
Donna from SWISCO responded:
Hi, Thanks for posting with images.
This does look like the 28" Series 770 balance. Please remove the window sash and place it on a scale. We need the weight of the window sash in pounds to determine the proper stamp option.
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