Need Help Finding Top Sash Guide

A home owner from Naples FL says:
Hi. The slot this fits in is 5/8" wide. What do you think? 201 or 44?
Thumbnail of the uploaded file named IMG_20240114_143112116_HDR.jpg
Thumbnail of the uploaded file named IMG_20240114_143045210_HDR.jpg
Profile picture of Bob
Bob from SWISCO responded:

Thanks for posting. The 18-201 would be my first guess, but the design is different enough to give me pause. How does our 18-009 or 18-166 compare? Though they have a different design, if the dimensions otherwise match best then one of these might work also. Compare your old guide with the diagrams listed below and let me know what you think.

Dimensions for 18-201
Dimensions for 18-201
Alternate view of 18-201
Alternate view of 18-201
Profile view of 18-166
Profile view of 18-166
Detail of 18-166
Detail of 18-166
Profile view of 18-166
Profile view of 18-166
Detail of 18-009
Detail of 18-009
Side view of 18-009
Side view of 18-009

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