BONVILLE CASEMENT WINDOW CRANKS

A contractor from New York says:
NEED WINDOW CRANKS FRO BONVILLECASEMENT WINDOW
PATTENT # 5410778
TWIN ARMS
3 OF OPEN LEFT
2 OF OPEN RIGHT
GOLDISH TAN IN COLOR
ALSO NEED 2 FOLDIND HANDLES
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Bob from SWISCO responded:

This looks like either the 39-253LB and 39-253RB , or the 39-438B and 39-439B . The difference between these two types of operators is explained in the video below.

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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