Window lock

A home owner from New York says:
Hi. I'm looking to replace a damaged window lock and I believe I found the correct one on your website. However I'm confused about the measurements. Could you please help me determine which one I would need? Thank you in advance.
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Casey from SWISCO responded:

Hello,

We'd be happy to help but we would need to see your lock uninstalled to determine how it latches to sash closed. Also, which of our parts were you looking at and which measurements were you concerned by? Thank you!

A home owner from New York says:
The piece I'm looking at is the rear mount casement lock. It's appears to be the exact type. I'm just not sure I understand how to properly measure for sizing.
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Casey from SWISCO responded:

As I mentioned, we need to see the rest of the lock that is not visible while it is installed to begin to tell you what to measure and which replacement might work for you. 

A home owner from New York says:
Attached are the photos. Please let me know if you need additional
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Casey from SWISCO responded:

Your lock resembles our 38-036 casement lock. See our 2-1/2" hole spacing below that will help you confirm that this is the correct replacement. Thank you!

Alternate view of 38-036
Alternate view of 38-036
Anatomy of a casement window
Anatomy of a casement window
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