Searching for Nami HII-280-1 casement window operator

A quick learner says:
August 12, 2023
Hi Folks,
We have a vinyl double casement window made by NAMI.
Approximately 35 years old?
It has a Code# HII-280-1
Series CLCASE.
We need the left and right hand window operators.
Attached are the pictures of the left hand operator.
Please ignore the ferrule nut on the inside. It is not factory.
Thank you! Stuart
Thumbnail of the uploaded file named 20230812_133055.jpg
Thumbnail of the uploaded file named 20230812_133200.jpg
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Bob from SWISCO responded:
August 12, 2023

Hey Stuart. I believe this might be our 39-187, or possibly the 39-089. These operators are very similar, except for the shape of the gear arm, or the inner part of the arm. On the 39-089, this part is shaped like a 'Z', but on the 39-187 it's more like a 'W'. See the images below for reference. Compare both with your old mechanism and see if you think either of these matches what you have. For a compatible handle, use the 39-114L sold separately.

Dimensions for 39-089
Dimensions for 39-089
Dimensions for 39-187
Dimensions for 39-187
Sash Dyad Crank, 5"
Sash Dyad Crank, 5"
39-187
$37.10
Window Dyad Crank, 5"
Window Dyad Crank, 5"
39-089
$43.70
Crank Handle, 11/32"
Crank Handle, 11/32"
39-114L
$4.42
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