Anderson balancer

A home owner from Waynesville, Ohio says:
stamps on balancers:
D15 7#27 784
11600-17

on opposite side is stamped:
11600-3 above the US PAT


What model do I need for replacement?
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Bob from SWISCO responded:

See our 24-737. This is meant to replace old Andersen balances with the stamp 7#27.

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