Hurd casement wondow crank replacements-right and left handed

Quick Learner from villanova pa
Hi-I need to identify a right and left handed replacement for my Hurd casement wondows. the gear is stripped on each of them.
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Bob
Bob from SWISCO
SWISCO
Expert

This appears to be either a 39-253LB or 39-438B operator. These operators are very similar save for a difference in the attachment at the end of the straight arm. The video below explains. 

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