Mk II with a WS base?

[thrawnformbi]

Hello,

Curious if anyone can ID this scope base found on a Mk II sitting in a US marked stock (no NY marks). This seems to be a different variant to what I've seen in photos used on the Mk III's although it has the same idea. It does seem like it would fit a WS musket sight though.

Any ideas on its origins?

Information

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[Promo]

It does not look correct to me, screws much too small and finish looks new. Stop cut looks drilled and overall machining is very poor. Most possibly someone did a reproduction based on pictures and even used a wrong rifle.

[Surpmil]

It's very poorly done fake of a combination that never existed.

I would treat the seller's other listings with extra caution from now on.