SILCOCK PATENT Dual Moving Fillister Plane.
One of 2 known examples. Fine & flawless & complete. Based on James Silcock’s 1844 patent.
This Fillister Plane was made for QLOC Studio.
References: https://www.jimbodetools.com/collections/whats-new/products/one-of-a-kind-silcock-patent-dual-moving-filletster-plane-excelsior-108193-as-of-july-21