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Balance blank

Marine chronometer balance blank (No 5). Marine chronometer which does not exist as a whole, but as parts numbered .1- .76

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Object Details

ID:	ZAA0246.37
Type:	Balance blank
Display location:	Not on display
Creator:	Thomas Mercer Chronometers
Date made:	1979
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 32 x 32 x 6 mm
Parts:	Chronometer Pillar plate (ZAA0246.1) Escape wheel (ZAA0246.2) Fourth wheel (ZAA0246.3) Centre wheel and cannon pinion (ZAA0246.4) Third wheel (ZAA0246.5) Fusee ratchet wheel with clicks and springs (ZAA0246.6) Minute wheel and pinion (ZAA0246.7) Barrel, barrel cover and main spring (ZAA0246.8) Balance staff with two rollers (ZAA0246.9) Potence with screw (ZAA0246.10) Fusee dust cap (ZAA0246.11) Minute wheel stud (ZAA0246.12) Steel balance blank (ZAA0246.13) Escape wheel blank (ZAA0246.14) Escape wheel (ZAA0246.15) Pinion (ZAA0246.16) Escape wheel blank (ZAA0246.17) Escape wheel blank (pressed out) (ZAA0246.18) Escape wheel blank (cut) (ZAA0246.19) Balance spring with stud with collet (ZAA0246.20) Third and fourth wheel bar and screws (ZAA0246.21) Great main wheel (ZAA0246.22) Barrel arbor blank (ZAA0246.23) Barrel arbor (ZAA0246.24) Maintaining power click (ZAA0246.25) Fusee pipe seal (ZAA0246.26) Maintaining power spring (ZAA0246.27) Fusee ratchett wheel blank (ZAA0246.28) Great wheel (ZAA0246.29) Detent with fixing screw (ZAA0246.30) Fusee (ZAA0246.31) Barrel arbor (ZAA0246.32) Hour wheel (ZAA0246.33) Fusee chain (ZAA0246.34) Balance cock and screw (ZAA0246.35) Balance (ZAA0246.36) Balance blank (ZAA0246.37) Balance blank (ZAA0246.38) Balance blank (ZAA0246.39) Maintaining power spring (ZAA0246.40) Click spring (ZAA0246.41) Wheel (ZAA0246.42) Wheel stud (ZAA0246.43) Balance blank (ZAA0246.44) Fusee (ZAA0246.45) Pillar plate fusee (ZAA0246.46) Balance blank (ZAA0246.47) Fusee blank (ZAA0246.48) Pillar (ZAA0246.49) Pillar (ZAA0246.50) Pillar (ZAA0246.51) Pillar (ZAA0246.52) Barrel bar with click and two screws (ZAA0246.53) Set up click (ZAA0246.54) Fusee (ZAA0246.55) Fusee arbor (ZAA0246.56) Fusee collet and pin (ZAA0246.57) Great wheel (ZAA0246.58) Ratchett wheel (ZAA0246.59) Balance staff (ZAA0246.60) Balance staff (ZAA0246.61) Small roller (ZAA0246.62) Small roller (ZAA0246.63) Small roller (ZAA0246.64) Escape wheel pinion (ZAA0246.65) Escape wheel pinion (ZAA0246.66) Escape wheel pinion (ZAA0246.67) Escape wheel pinion (ZAA0246.68) Escape wheel collet (ZAA0246.69) Large roller (ZAA0246.70) Large roller (ZAA0246.71) Large roller (ZAA0246.72) Large roller (ZAA0246.73) Lower fusee bush (ZAA0246.74) Upper fusee bush (ZAA0246.75) Chronometer (ZAA0246.76) Barrel (ZAA0246.77) Set up ratchet wheel (ZAA0246.79)

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