Lock cylinder

A contractor from Broomall, PA says:
Hello,

I'm looking to replace the lock cylinder on my mother in laws storm door.

Can you point me in the right direction?

Thanks in advance!
Bill
Thumbnail of the uploaded file named squared off key lock
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Emily from SWISCO responded:

Thank you for reaching out to us, Bill. The 40-049 appears to be the best we can offer. I'm afraid we don't sell an exact match for your old hardware. Have a look at the specifications and see if you think this could work for your repair. 

alternate view of 40-049
alternate view of 40-049

Dimensions for 40-049
Dimensions for 40-049

How to install the Swisco 40-049 Mortise lock set.
How to install the Swisco 40-049 Mortise lock set.
VIDEO
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How to flip a storm door mortise latch.
How to flip a storm door mortise latch.
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