Please help identify this vintage storm latch

A quick learner from Chicago, IL says:
Please help identify this vintage storm latch. It's 2 inches in length. Thanks!
User submitted a photo of a pivot bar.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I have seen many storm latches, but yours does not look familiar. It could be that it is no longer available. I would suggest considering our 91-185 and cutting off the end to adapt it to your storm sash. Another suggestion would be to try the 91-179. Take a look and see what you think.
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