Missing window crank openers

A home owner from Boston MA says:
July 1, 2013
I bought a house with missing window crank openers. My neighbor has the same windows (from the same builder) and took a couple of photos showing the mechanics and the opener. I took a photo showing the location (3 holes) on the inside lower corner of the window. No information on the name of the manufacturer.
User submitted photos of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
July 2, 2013
Thanks for posting. I'm afraid I can't quite make out what this operator is, as I cannot see the whole thing. Could I see it's arms? That will help us locate a replacement. Thank you!
A home owner from Boston MA says:
July 2, 2013
Hi Tom,
Please see attached the 3 photos for the arms.

Thanks,
Jonathan
User submitted photos of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
July 3, 2013
Hey, Jonathan, thanks for the pictures. That's definitely a help, though I still can't quite make out what operator this is. I've narrowed it down to three possible pairs.

Check out our 39-031 & 39-032, 39-0155 & 39-156, and finally the 39-333 & 39-334. Carefully compare the dimensions we show to your own hardware and let me know how they match up.
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-031
$29.70
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-032
$29.70
Caradco Window Crank, 9-1/2"
Caradco Window Crank, 9-1/2"
39-155
$29.85
Caradco Window Crank, 9-1/2"
Caradco Window Crank, 9-1/2"
39-156
$29.85
Egress Operator, Extra Short Link Arm
Egress Operator, Extra Short Link Arm
39-333
$37.10
Egress Operator, Extra Short Link Arm
Egress Operator, Extra Short Link Arm
39-334
$37.10
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