Window cranks and maybe the plastic parts that are broken off screen?

A quick learner from Oak bluffs, MA 02557 USA says:
The crank on the right is broken, and the one on the left probably could be replaced as well. The little plastic parts on the screens have broken off as well
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Emily from SWISCO responded:

Hi there! Could you open your window and show us the arms that move the window sash? 

A quick learner from Oak bluffs, MA 02557 USA says:
Sure! Thank you!
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Emily from SWISCO responded:

Thanks! Looking at these new pics, you have either our 39-253LB and 39-253RB, or the 39-438B and 39-439B. The key difference is the design of the slider at the end of the arm. I recommend watching the video below, which goes over this difference in detail. This should allow you to decide which pair would be better suited for your window.

A quick learner from Oak bluffs, MA 02557 USA says:

It's the one with the black rectangle already attached. Can you tell which side it is from my photos? The locks are on the left and the hinges are on the right as you can see. When you're looking at my photos it's the window on the right with the broken handle. And I'll need a new handle as well.
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Tom from SWISCO responded:

Sure, so that would be the 39-438B and 39-439B. You show both sides in your photos, but the photos in your first post on the 7th show the 39-438B and your second batch on the 12th show the 39-439B.

For the covers and handles, see our 39-451 and 39-452, respectively.

A quick learner from Oak bluffs, MA 02557 USA says:
Can you tell from these photos which I need? They are taken from below.

It's the window on the right with the locks on the left and the hinges on the right.
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Tom from SWISCO responded:

I can, yes. That would be the other pair I mentioned, which is the 39-253LB and 39-253RB. You can use the same covers I mentioned for the first pair.

A quick learner from Oak bluffs, MA 02557 USA says:
Thank you! I don't think I need them both - just The one you can see from inside that's on the right, with the broken handle. The latches are on the left. So is that L or R?
Thanks again!
Can I order from you? How?
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Tom from SWISCO responded:

I'm not sure what you consider left or right, every customer and window manufacturer defines that differently. If you mean the operator you showed in your first batch of photos then that's the 39-438B operator and 39-451 cover. You just need to focus on what side the handle is on and use that as a reference for what side you need.

All orders can be placed directly on our site whenever you want.

A quick learner from Oak bluffs, MA 02557 USA says:
I've only been sending photos of the same window. Once again, from this picture, it's the window on the right. It's the window with the broken handle. It's the window where the latches are on the left and the hinges are on the right.
This photo is taken from the inside of the house. The left edge of the right window moves out and the right edge of the right window stays in place. That's the window that I need. Is that clearer? Could you help me know which ones to order? Thanks so much!
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Tom from SWISCO responded:

Thanks for clarifying. That would be the 39-438B. You can tell this because the handle is on the same side of the operator base as your original. That's the deciding factor.

A quick learner from Oak bluffs, MA 02557 USA says:
Thank you!
Comparing the 39-253LB & 39-438B Operators
Comparing the 39-253LB & 39-438B Operators
VIDEO
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Anatomy of a casement window
Anatomy of a casement window
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How to Orient a Dual-Arm Operator
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How to identify casement and awning operators
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