Anderson spring sash balancer

A quick learner from Cheswick, Pa. says:
As you can see in the photo, the numbers stamped in the corner are :
D 7 27 273.
Hope you can identify, as all of your photos seem to have a tab, which this one does not have...
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Paul from SWISCO responded:
Hello! Based on your stamp of "7 27," I recommend our 24-737 Andersen sash balance.
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