2.75mm Square for Schatz Long Shaft
Key/Schatz Long Shaft Size 3 Brass plated key generally fits Anniversary clocks with #53 Schatz movements (The movement number is usually stamped on the back plate with a circle around it). 3mm square hole. This key has a 3 3/8" shaft, making it easier to wind hard to reach winding arbors. The Schatz logo is stamped on the key.
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