Can anyone identify this winch?

[Ironman162]

My boat has the winch on the picture and the only identification is the number SD3 on the base.
I will appreciate any information about this winch.
It looks like it could be a old style Muir winch and weighs 56kg without a motor.

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[Siberianhusky]

Looks a good bit like an old Muir windlass. Uncle had one on his lobster boat. Hauled pots and the anchor with it.