8 3/4”’ | Automatic | Swiss Lever | Sweeping Seconds | Date |

Remarks:

• Sweeping seconds with hacking
• Often referred to as ST6, although without the D, the hand-wound version is actually meant
• Depending on the supplier, different designations are used for the movement, e.g. at Cousinsuk.com online: ST6DL or ST6D1 for the 8 3/4”’ variant, ST6D3 for the 11 1/2”’ variant. And in the Cousins Seagull catalog from 2013: TY61DK/ST6112 for the 8 3/4”’ variant
• Also available as ST6D 11 1/2”’
• Other variants of the ST6 movement family:
  • ST6103K:
    8 3/4”’, automatic, 21 Jewels, 3 hands, skeletonized
  • ST6502/TY601:
    11 1/2”’, automatic, 23 jewels, 3 hands, date at 3H, day of the week at 9H, day/night indicator at 6H
  • ST6811/TY603:
    8 3/4 x 11 1/2”’ (20 x 26 mm) form movement, automatic, 23 jewels, 3 hands, 24H display at 12H, open heart at 6H
  • ST6821/TY604:
    8 3/4 x 11 1/2”’ (20 x 26 mm) form movement, automatic, 23 jewels, 3 hands, large date at 12H, open heart at 6H
  • ST6851/TY605:
    8 3/4 x 11 1/2”’ (20 x 26 mm) form movement, automatic, 23 jewels, decentralized hour/minute at 12H, open heart at 6H
    ST6861/TY606:
    8 3/4 x 11 1/2”’ (20 x 26 mm) form movement, automatic, 23 jewels, 3 hands, small pointer date at 3H, open heart at 6H, 24H plus day/night display at 10H
  • ST6880/TY608:
    8 3/4 x 11 1/2”’ (20 x 26 mm) form movement, manual winding, 20 jewels, 3 hands, open heart at 6H
  • ST6880K/TY608SK:
    Like ST6880/TY608, but skeletonized
  • ST6881/TY608A:
    8 3/4 x 11 1/2”’ (20 x 26 mm) form movement, automatic, 20 jewels, 3 hands, open heart at 6H

• Listing ID: 2564
• Manufacturer / Brand: Sea-Gull / Seagull
• Caliber: ST6D 8 3/4'''
• Size in French Lignes: 8 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 23
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: Similar to Incabloc
• Beats per hour: 21,600
• Balance Type: Unknown, probably Nickel
• Power Reserve: Approx. 36 hours
• Production Period: Hand winding version ST6 of the small ladies' movement built from 1975 onwards, as automatic ST6D since the 1980s
• Identification: 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-35#post-4350571
• Country: China
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)