Stripped gears

A quick learner from Washington DC says:
Hello! Not sure the make of this window, hence the search! Hopefully the picture is enough. Need a new gear to open and close the window since the current one doesn't grip enough to close.

Thanks!!
Dan
Thumbnail of the uploaded file named 14079957-6C7D-45D1-B00B-ADF5C279DE1B.jpeg
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Bob from SWISCO responded:

This appears to be either a 39-253LB & 39-253RB, or the 39-439B & 39-438B. The only difference between these two sets of operators is the attachment at the end of the straight arm. The video below explains more.

39-529 : Truth Hardware Track Slider
Truth Hardware Track Slider
39-529
$0.97
VIEW >
39-375 : Truth Folding Handle with Cover
Truth Folding Handle with Cover
39-375
$10.87
VIEW >
39-376 : Truth Folding Handle with Cover
Truth Folding Handle with Cover
39-376
$10.87
VIEW >
39-253LB : Encore Dual Arm Operator, Sill Mount
Encore Dual Arm Operator, Sill Mount
39-253LB
$29.70
VIEW >
39-253RB : Encore Dual Arm Operator, Sill Mount
Encore Dual Arm Operator, Sill Mount
39-253RB
$29.70
VIEW >
39-438B : Encore Dual Arm Operator, Sill Mount, Low Profile
Encore Dual Arm Operator, Sill Mount, Low Profile
39-438B
$32.88
VIEW >
39-439B : Encore Dual Arm Operator, Sill Mount, Low Profile
Encore Dual Arm Operator, Sill Mount, Low Profile
39-439B
$32.88
VIEW >
39-451 : Truth Operator Cover and Handle
Truth Operator Cover and Handle
39-451
$11.70
VIEW >
39-452 : Truth Operator Cover and Handle
Truth Operator Cover and Handle
39-452
$11.70
VIEW >
How to Orient a Dual-Arm Operator
How to Orient a Dual-Arm Operator
VIDEO
WATCH >
Comparing the 39-253LB & 39-438B Operators
Comparing the 39-253LB & 39-438B Operators
VIDEO
WATCH >
Anatomy of a casement window
Anatomy of a casement window
VIDEO
WATCH >
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