Replacement Andersen balancers

A landlord from Connecticut says:

I would like to order replacement sash balancers for may Andersen windows which I believe are about 30 years old.

I have attached two photos of two balancers that I believe fit. Could you give me the current order numbers for these? Even though the numbers imprinted on the balancers (in the photos) are different - I hope that a single replacement will work for both.

Could I have the product number and price please.

thank you,

User submitted photo of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for the great image, Eric, this is exactly what we need to see. I recommend our 24-737, which can replace Andersen balance boxes stamped with "7 31."
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