Crank question

A handy person from Allentown PA says:
April 27, 2021
30614
30893

PAT CANADA 1986

US PAT. 21355397

Made in USA

UU PAT. 4505601

Screw holes 5" apart

Arm is 4" from rivet to hole.
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Casey from SWISCO responded:
April 28, 2021

Hello,

Take a look and compare the specifications of our 39-187 and 39-188 Dyad operators to your original hardware. Thanks for posting! 
A handy person from Allentown PA says:
April 28, 2021
Hi the 39-187 and 39-188 seem right except the arm is 5" instead of 4" which is what my existing crank has. Any suggestions?
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Tom from SWISCO responded:
April 30, 2021

We don't have operators in this style with link arms in that size, unfortunately. If you're handy then you could consider swapping the arms between them. You can use a rivet like our 62-014 to hammer the old arm onto the new operator.
Sash Dyad Crank, 5"
Sash Dyad Crank, 5"
39-187
$37.10
Sash Dyad Crank, 5"
Sash Dyad Crank, 5"
39-188
$37.10
Rivet
Rivet
62-014
$1.12
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