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Tissot 27 B

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12”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

  • Movement family:
    • Flat base plate
      • Tissot 27 : small seconds, no shock protection
      • Tissot 27-1 : small seconds, Incabloc shock protection
      • Tissot 27-3 : small seconds, Shock Resist shock protection
      • Tissot 27-2: sweeping seconds, no shock protection
      • Tissot 27-23 : sweeping seconds, Shock Resist shock protection
      • Tissot 27-53: chronograph 60 s, Shock Resist shock protection
      • Tissot 27-63: small seconds, date, Shock Resist shock protection
    • Bevelled base plate, modified setting-lever spring
      • Tissot 27-T : small seconds, no shock protection
      • Tissot 27-1T: small seconds, Incabloc shock protection
      • Tissot 27-2T: sweeping seconds, no shock protection
      • Tissot 27-21T: sweeping seconds, Incabloc shock protection
      • Tissot 27-61T: small seconds, date, Incabloc shock protection
    • Movement redesigned
      • Tissot 27 B : small seconds, no shock protection
      • Tissot 27 B-1 : small seconds, Incabloc shock protection
      • Tissot 27 B-2 : sweeping seconds, no shock protection
      • Tissot 27 B-21: sweeping seconds, Incabloc shock protection
      • Tissot 27 B-61: small seconds, date, Incabloc shock protection
      • Tissot 27 B-621: sweeping seconds, date, Incabloc shock protection
      • Tissot 27 B-9: no seconds, no shock protection

 

  • Listing ID: 18698
  • Manufacturer / Brand: Tissot
  • Caliber: 27 B / 27B
  • Size in French Lignes: 12'''
  • Size range mm largest diameter: 22 - 31 mm
  • Shape: Round
  • Winding: Manual (Crown)
  • Hands Setting: Crown
  • Seconds Hand: Small seconds
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date, Day, Month...: None
  • Jewels: 15
  • Setting Lever Screw/Pin Position: Left
  • Balance Position: Bottom (120 - 240°)
  • Holes in setting lever spring or rocking bar: 3
  • Shock Protection: None
  • Beats per hour: 18,000
  • Balance Type: Monometallic screw balance
  • Power Reserve: Approx. 42 hours
  • Production Period: 1936 - 1949 (all caliber 27 variants)
  • Country: Switzerland
  • Identification: Movement marked with 27 B under the balance wheel, and with TISSOT on the wheel train bridge. Original datasheet available.
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
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