Rt. & Lft. Dual arm casement crank assemblies

A quick learner from Creedmoor N C says:
October 8, 2020
These are single windows 30" x 50"
Made by Hurd
Installed about 2002
White
Long strait arm is about 9.5"; jointed arm (passing over start.arm) eachpiece is about 4.5" & is mounted to window w/a bracket.
Long arm mounts to window in a slide.
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Bob from SWISCO responded:
October 12, 2020

This looks like either the 39-253LB and 39-253RB, or the 39-438B and 39-439B to me. The difference between these two sets of operators is illustrated in the video below.
Encore Dual Arm Operator, Sill Mount
Encore Dual Arm Operator, Sill Mount
39-253RB
$30.70
Encore Dual Arm Operator, Sill Mount, Low Profile
Encore Dual Arm Operator, Sill Mount, Low Profile
39-439B
$38.64
Encore Dual Arm Operator, Sill Mount
Encore Dual Arm Operator, Sill Mount
39-253LB
$30.70
Encore Dual Arm Operator, Sill Mount, Low Profile
Encore Dual Arm Operator, Sill Mount, Low Profile
39-438B
$38.64
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 >
How to identify casement and awning operators
How to identify casement and awning operators
GUIDE
READ >
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