I have 25" channel balance stamped 24D

A home owner from Doral, Florida says:
I have American Windows Miami brand windows circa 1994. One of them has a broken set of balances marked 24D. I didn't find an exact match. Sash measures 50"x25", aluminum, single glass (15-20 lbs maybe?). The shoe looks like your 15-004 and the top like your 19-042 because it is connected to the top of the sash with a screw. Please assist.
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Paul from SWISCO responded:

Reviewing your photos closely, I am more incline to lean towards the 19-031 top balance shoe as making the better option. Look it over and see what you think. From there review our Series 371 balance for consideration.

A home owner from Doral, Florida says:
It does look like the 19-031 but it's closed at the top and screwed to the window sash keeping it in place. In that case maybe the 19-004 would be better. It looks very similar but closed on top.The shoe is 1 3/32" deep, so definitely a 15-004 . If you think that the 19-004 would receive a screw then that would be the way to go.
Thank you.
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Paul from SWISCO responded:

I don't think either the 19-004 or 19-031 are designed to use a screw. To be honest, I'm not sure why yours has a screw in the first place. Can you describe to me its function?

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