29" Channel Balance

A quick learner says:
Can you identify my unique 28-D-40 balance replacement.
29" window channel balance stamp number unique 28-D-40.
width of balance - 1/2"
length of balance - 29"
width of shoe - 0.875"
Thank you !
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Bob from SWISCO responded:

See if our S380-29 Channel Balances matches up. Make sure all the dimensions and specifications, including the 1" deep nylon shoe, matches up. You'll need a stamp option of 2840. 

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