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1955 Early prototype design - one coil

1955 Early index mechanism concepts

1955 Early prototype design with no pawl finger

1956 Hamilton Electric 500 Movement

1956 Tuning fork time keeping concept

1956 Index finger design concepts

1956 Index finger deflection restraints

1960 Prototype pre-214 movement

1961 Early production 214 & circuit design

1962 Tuning fork clock

1963 Fork design with pawl on fork

1965 Unproduced 214 setting mechanism design

1966 Cutting index wheels

1966 Unproduced magnetic wheel design without index fingers

1966 Unused single coil design

1966 W-type tuning fork prototype watch

1968 Early f300 design

1968 The f8192 produced by omega

1968 Magnetically coupled gears with index fingers

1969 Longines ultraquartz coil

1970 Accutron 2300 movement design

1970 Accutron 221 movement design

1970 Omega f300 production design

1970 Omega F8192 production movement

1970 Hamilton resonator eccentric drive design concept

1970 Omega Megasonic early concept

1970 Longines ultraquartz design

1970 Longines QuartzChron article similar to Ultraquartz

1970 Citizen oscilliator & index finger design concept

1971 Tuning fork clock

1972 Omega f300 based Speedsonic chronograph design

1972 Megasonic earlier micromotor design

1972 Megasonic f720 micromotor design

1972 Megasonic micromotor refinement

1972 Tuning fork magnet designs

1973 Early megasonic micromotor & magnetic geartrain drive concept

1973 Manufacturing magnetic wheels for megasonic