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Rolex 3155

© Rolex

Cal. 3155 is an automatic movement with day and date used in the famous Rolex “President” Day-Date watch from 1988 through 2019. It was launched in 1988 in Ref. 118000, replacing Cal. 3055 in the Day-Date. The Day-Date was updated in 2000 but continued to use this movement, even as the Day-Date II launched with the larger Cal. 3156. Cal. 3155 continued in use in the 36 mm Day-Date until 2019 when the new Day-Date 36 with Cal. 3255 was introduced.

Note that many sources list the height of Cal. 3155 as being 6.00 mm (the same as the base Cal. 3135), the official Rolex parts document shows it as 6.45 mm.

Parachrom Update

Cal. 3155 was updated with the Parachrom hairspring between 2008 and 2010 but continued to use the Kif Elastor anti-shock device, unlike other Parachrom movements.

3000 Family3100 FamilyParachrom FamilyChronergy Family
1977-20011988-20102005-present2015-present
Time Only300031303130
3132
Milgauss3131
Datejust303531353135
3136
3235
Day-Date305531553155
3156
3255
GMT307531753187
GMT II3085318531863285
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