Assembling The HMT 0231 Movement

The HMT cal 0231 is a licensed and slightly modified version of the Citizen 1802 without the date mechanism. The official caliber designation 0231 is found etched on the caliber main plate.

This time 'On The Bench', I am assembling the HMT 0231 movement as featured in the HMT Kohinoor watch. The video shows just the assembly process without oiling or lubrication.

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Technical Details:
Maker: HMT
Year: 1975
Material: Stainless steel
Caliber: Manual Wind HMT 0231
Dimensions: 25.6mm diameter; 4.55mm thickness
Beat Rate: 18,000 bph (beats per hour)
Jewels: 17
Power Reserve: 38h
Functions: Hour, minute, sweep second
Shock Protection: Parashock Shock protection

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