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755502001
Marine chronometer; spring-driven; thirty-hour movement; fusee with Harrison's maintaining-power; club-tooth lever escapement; balance with bimetallic rim for temperature compensation; independent seconds-train, recording minutes and seconds on right-hand dials; main dial for hours and minutes on left, seconds-dial above; lower 'up-and-down' dials indicate running time available for going-train and independent seconds-train; canister enclosing movement; suspended in gimbals within walnut box; complete with canister-securing key and winding key.
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