Replacement Cylinder

A quick learner says:
October 7, 2019
I'd like to change the cylinder in this door. Which one should I purchase?
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Tom from SWISCO responded:
October 11, 2019

It's hard to tell what you have from these photos. You could possibly have something like the 40-089, but this is just an educated guess. Look over our dimensions and let me know what you think.
Key Tumbler Thumbturn
Key Tumbler Thumbturn
40-089
$27.15
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