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You are here: Home / Movements / Seiko 8L34

Seiko 8L34

Last Update: February 2, 2020

Brand:Seiko, Shizukuishi Watch Studio
Family:
Seiko 9S5x Family
Height:
Jewels:20
Reserve: hours
Frequency:28,800 A/h
Winding:Hand winding
Diameter:
  Complications:
Hands:Central Hour Hand, Central Minute Hand, Lépine Small Seconds Hand, Small Seconds Hand at 9:00
Distinguishing Technical Characteristics
Hand-Winding
Clockwise Balance Cock
Screw Regulator
Balance
Balance at 1:30
Production: 2000 – 2000
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

Cal. 8L34 is a rare hand-winding pocket watch movement used only in the 2000 Seiko Historical Collection limited edition watch. It is derived from the Grand Seiko Cal. 9S54 but has small seconds in the “lépine” location, opposite the winding crown. It is highly unusual for a pocket watch movement, running at 28,800 A/h and quite small at 12.5 ligne (28.40 mm) in diameter. Cal. 8L34 was constructed at Seiko’s Shizukuichi Watch Studio along with Grand Seiko movements.

ProductionApplicationWindingJewelsNotes
8L212003-2007Brightz SAGLAutomatic24Similar to 9S51
8L342000Railway pocket watchManual20Small seconds
8L352000-presentBrightz SAGQ
Prospex SBDX
Prospex SLA
Automatic26Date, similar to 9S55
8L362011-presentCredor GCBZ
Galante SBLM
Automatic27GMT, similar to 9S56
8L382010-2015Galante SBLLAutomatic26Open Heart
8L75-2005Credor GCBRAutomatic26Date, similar to 9S55
9S511998-2009GS SBGRAutomatic24No date
9S542001-2010GS SBGWManual20No date
9S551998-2010GS SBGRAutomatic26Date
9S562002-2010GS SBGMAutomatic27GMT, no date

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