Rare UNION 22971 4" SC Sashlock with Roller latch 4Lever Butters System levers

Union 22971 - 4" Sash Lock with roller Latch 4 lever Butters System. 22971 Is a special higher spec version of 2277/2297 sashlocks. with Master Keys, Sub Master keys etc often used in schools and large institutions by the use of "side wards" in the side of the keys which enabled then to make hundreds of different lock with different keys but still opened by the Masters.

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