Storm door lock

A friend from St Paul, MInnesota says:
March 7, 2024
Can't find any name. The lock is about 2.25" long less handle. About 1 5/16" high and 11/16 wide at the top and 3/8 wide at the bottom. Separate "cams?" in the center.
Thumbnail of the uploaded file named key lock thumbturn
Thumbnail of the uploaded file named key lock thumbturn
Thumbnail of the uploaded file named mortise lock installation holes
Thumbnail of the uploaded file named mortise lock installation holes
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Emily from SWISCO responded:
March 8, 2024

Hello! Thanks for reaching out to us. It sounds like you're looking for the key tumbler. The 40-089 and 40-123 come to mind though we can't promise they will be compatible with your existing mortise lock. Have a look at the specifications and see how they compare with yours. 

Exterior view of 40-089
Exterior view of 40-089

Alternate view for 40-123
Alternate view for 40-123

Dimensions for 40-123
Dimensions for 40-123
A friend from St Paul, MInnesota says:
March 8, 2024
The workings of 089 look correct with the two separate center parts. But it has the wrong shape. The 123 has the right shape but a different center part. I don't know if that makes a difference in the operation. With the existing one, the key turns one half of the center part to lock and unlock. While the thumb knob actuates the other half to lock and unlock.
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Dave Sr. from SWISCO responded:
March 11, 2024

I'm not sure if either key cylinder will work on your locking handle. You might need to replace the complete handle set. I recommend you have a look at the 40-049 handle set to see if this is something that can be adapted to your door. 
Key Tumbler Thumbturn
Key Tumbler Thumbturn
40-089
$27.15
Complete Mortise Lockset, Brass
Complete Mortise Lockset, Brass
40-049
$72.02
How to flip a storm door mortise latch.
How to flip a storm door mortise latch.
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How to install the Swisco 40-049 Mortise lock set.
How to install the Swisco 40-049 Mortise lock set.
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