Replacement crank for small bathroom window

A quick learner from State College, PA says:

i have 2 bathroom windows (approx 28w x 18h) that i removed the cranks from, due to rust (they were frozen and open 1-2" year round). My neighbor got parts from you for a similar window, but his dual arm crank looks smaller (39-140). I'm guessing i need the 21.5" size (39-083) to match the photo i sent?

The hinges on the side seem fine, and my crank handle seems fine.

I think i need the Window Sash Bracket too (39-170).

The Crank base has a Truth logo on the back, and a U.S. Pat. 4505601 on the bottom.

Am i looking at the right replacement part?

thank you,

Steve 

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Tom from SWISCO responded:

As long as your "elbow to elbow" measurement is 21-1/2", then I do believe the 39-083 is our best option. That measurement would be the deciding factor.

A quick learner from State College, PA says:
Thanks for the reply. The old piece is too rusted to close completely like the 39-083 photo, but it's very close to 21" as it is. Is there a part that is slightly larger or is this the best option?
Can I send a different photo?
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Tom from SWISCO responded:

There's not another picture you can send us that would narrow it down. The size is the determining factor right now, and that's out of my hands. You'll have to use your best judgement.

The only other operator we have in this style that's larger than the 39-083 is the 39-015, but I don't think that's it.

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