Old casement window operator. U.S.Pat 4.241.541

A quick learner from Laguna Woods, Ca. says:
February 13, 2020
The single arm on 'this operator is 9.5 inches long. I need to replace at least four of them. As you can see the crank handle is located in the middle of the plate.
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Casey from SWISCO responded:
February 14, 2020

 I recognize this old operator. Unfortunately,these are not made anymore, and we cannot be sure if anything we carry can work in substitution. The closest we have are our 39-216 or 39-028E. I've also made a list of related parts you may want to look over.

The problem with using either of these two operators is that they will likely not fit your existing sill or sill trim. You may want a local professional to come out and look your windows over to see what they exist. If either the 39-216 or 39-028E can work, they'll require adaptation of your sill and I cannot be sure as to the extent. 
#8 x 1" SS Installation Screw
#8 x 1" SS Installation Screw
33-016
$0.25
Truth Hardware Operator Cover
Truth Hardware Operator Cover
39-107
$3.30
Crank Handle, 11/32"
Crank Handle, 11/32"
39-114L
$4.42
Truth Folding Crank Handle, 11/32"
Truth Folding Crank Handle, 11/32"
39-205
$11.70
Single Arm Window Crank
Single Arm Window Crank
39-216
$40.39
Ellipse Style Single Arm Operator, 9-1/2"
Ellipse Style Single Arm Operator, 9-1/2"
39-028E
$20.70
#8 x 3/4" Phil Flat SS Screw
#8 x 3/4" Phil Flat SS Screw
33-011
$0.24
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