S-751 knifelock balancer 28HD and a 34HD

A contractor from Michigan says:
S-751 knifelock balancer 28HD and a 34HD. Do these fit on the Craftline wood windows. This manufacturer is out of business and I have a customer that needs to replace at least two balancers. These windows have the vinyl track sash liners.
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Paul from SWISCO responded:
Yes, I believe you are correct. You may also need our 19-029 or 19-030 top installation hooks.
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