R.O.W. LH casement window operator (cira 1977-1980)

A home owner from Nashua says:
November 21, 2016
Hi - looking for this ROW lh casement window operator. can you help me out?
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
November 22, 2016
I've seen your operator before, but could never find an exact replacement. I've made a list of possible replacement parts for you to consider, which you can see on the right side of this page. I can't guarantee these will work for you, but I don't think we will have anything closer.
Casement Window Operator, 13-1/2" Arm
Casement Window Operator, 13-1/2" Arm
39-013
$20.70
Casement Window Operator, 13-1/2" Arm
Casement Window Operator, 13-1/2" Arm
39-014
$20.70
Crank Handle, 11/32"
Crank Handle, 11/32"
39-114L
$4.42
11-3/8" EntryGard Track, 4 Hole
11-3/8" EntryGard Track, 4 Hole
39-505
$3.70
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