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Our 1991 model year came with a Maxwell windlass that has performed wonderfully over the years of anchoring hundreds of times in PNW waters. Up until recently I knew little about it, such as model, nomenclature, service manual, etc.
In an effort to learn more about the unit I reached out to Maxwell, now owned by Vetus. After several messages and pictures, they concluded it was a Maxwell/Nillson brand model VW700 version 2. The Maxwell Nillson name is etched on the face of the clutch plate, which is the knurled ring next to the drum. The clutch plate is used to release or engage the drum/gypsy.
I have requested a PDF of a service manual, but due to the vintage, unlikely. But if one shows up, I will let you know.