Sea-Gull / Seagull ST2504 / TY2504

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13 1/2”’ (30.4 mm) | Height 7.4 mm | Automatic | Swiss Lever | Small Seconds | Retrograde Date/Day |

Remarks:

  • Automatic (unidirectional winding), small seconds at 9 o’clock (hacking), retrograde date at 9:30 o’clock (quick adjustment via pusher at 8 o’clock), retrograde weekday at 2:30 o’clock (quick adjustment via pusher at 4 o’clock)
  • The ST2551 is a member of a very large ST25/TY25 movement family
  • Movement with perlage
  • Ball bearing rotor
  • Listing ID: 159
  • Manufacturer / Brand: Sea-Gull
  • Caliber: ST2504 / TY2504
  • Size in French Lignes: 13 1/2'''
  • Size range mm largest diameter: 22 - 31 mm
  • Shape: Round
  • Winding: Automatic
  • Hands Setting: Crown
  • Seconds Hand: Small seconds
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date, Day, Month...: Date & Day
  • Jewels: 33
  • Setting Lever Screw/Pin Position: Right
  • Balance Position: Left (240 - 360°)
  • Shock Protection: Similar to Incabloc
  • Beats per hour: 21,600
  • Balance Type: Glucydur
  • Power Reserve: Approx. 45 hours
  • Production Period: Presumably at least since 2008
  • Identification: Movement listed on the Sea-Gull website
  • External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-60#post-8551029
  • Country: China
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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