Milgard window cranks casement w.

A handy person from Fallbrook CA says:
Swisco :

These 2002 dated milgard cranks are die cast metal painted bisque metal cover cranks
It has a 5/8 diameter crank handle insertion flat to meet the handle crank.

The weird part is the gear is opposed to the gear handle crank in comparison to your similar stock Truth cranks.

Let me know if this die cast cover milgard cranks are discontinued.

Thank you,

Edward
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Bob from SWISCO responded:

Thanks for posting. This looks like either a 39-253LB or 39-438B. The key difference between these two operators are the appendages at the end of the straight arm. The 39-253LB uses a square track slider sold separately, our 39-529, while the 39-438B uses a rectangular black slider that comes built-in to the straight arm. This slight difference effects window compatibility, so be sure to confirm what you have.

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