Patio Sliding door lock replacement

A friend from 81301 says:
The sliding door is from around 1970.
There are no manufacturer names or model numbers on the sliding door.
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Tom from SWISCO responded:

It's tough to make out what you have, but I think our 82-002K may be worth considering. Just note its overall size to ensure that it will sit in the space available in your door. Also note that the hook latch is in the lowest possible position it can be, just above the bottom screw. I can't quite tell from your photos where the hook latch is oriented. 

Alternate image for 82-002K
Alternate image for 82-002K

Alternate view of 82-002K Sliding door handle set
Alternate view of 82-002K Sliding door handle set

How to install the 82-002K sliding door handle key plug
How to install the 82-002K sliding door handle key plug
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