Rolex Day-Date movements

Information and pictures

Calibre 1055

  • Year of introduction: 1955/1956
  • Dimensions: 28.5 x 7mm
  • Functions: hours, minutes, sweep seconds, day, date
  • Jewels: 25
  • BPH: 18.000
  • Base caliber: 1030
  • Remarks
Rolex Day-Date Calibre 1055

Rolex Day-Date Caliber 1055

1055b

  • Year of introduction: 1957
  • Dimensions: 28.5 x 7.1mm
  • Functions: hours, minutes, sweep seconds, day, date
  • Jewels: 25
  • BPH: 18.000
  • Base caliber: 1030
  • Remarks
Rolex Day-Date Calibre 1055

Rolex Day-Date Caliber 1055b

1555

  • Year of introduction: 1959/1960
  • Dimensions: 28.5 x 7.03mm
  • Functions: hours, minutes, sweep seconds, day, date
  • Jewels: 26
  • BPH: 18.000
  • Base caliber: 1530
  • Remarks
Rolex Day-Date Calibre 1555

Rolex Day-Date Caliber 1555

1556

  • Year of introduction: 1965 [hacking 1972]
  • Dimensions: 28.5 x 7.03mm
  • Functions: hours, minutes, sweep seconds hacking, day, date
  • Jewels: 26
  • BPH: 19.800
  • Remarks
Rolex Day-Date Calibre 1556

Rolex Day-Date Caliber 1556

3055

  • Year of introduction: 1978
  • Dimensions: 28.5 x 7.11mm
  • Functions: hours, minutes, sweep seconds hacking, day, date
  • Jewels: 27
  • BPH: 28.800
  • Base caliber: 3035
  • Remarks
Rolex Day-Date Calibre 3055

Rolex Day-Date Caliber 3055

5055

  • Year of introduction: 1977
  • Dimensions: 29.75 x 7.11mm
  • Functions: hours, minutes, sweep seconds hacking, day, date
  • Jewels: 11
  • BPH: 32.768Hz
  • Base caliber: 5035
  • Remarks
Rolex Day-Date Calibre 5055

Rolex Day-Date Caliber 5055

 

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