A ruby cylinder movement with temperature compensation curb by John Roger Arnold. Full plate gilt keyless movement, the fusee and barrel under a bridge, Harrison's maintaining power. Plain cock with garnet endstone, long blue steel regulator with bi-metallic compensation curb. Plain three arm steel balance with blue steel spiral hairspring. Ruby cylinder, brass escape wheel, pivots with endstones. The dial layout originally in regulator style.

• Signed __________Jn R Arnold - London 3794
• Circa 1825
• Diameter 46.5 mm - Depth 11.5 mm
• Condition Excellent, working. Lacking dial, motion work and hands.

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