Grail Watch Reference

A Reference Library for Watches from Grail Watch

  • Movement Database
  • Grail Watch Blog
  • The Watch Files Podcast
  • Reference Documents
  • Vocabulary
  • About Grail Watch
  • Email
  • Instagram
  • LinkedIn
  • Twitter

Powered by Genesis

You are here: Home / Movements / Seiko 4S24

Seiko 4S24

Last Update: February 5, 2020

Brand:Seiko
Family:
Seiko 4S Family
Height:
Jewels:21
Reserve:40 hours
Frequency:28,800 A/h
Winding:Hand winding
Diameter:25.60 mm (11.5 ligne)
  Complications:Hacking Seconds
Hands:Central Hour Hand, Central Minute Hand, Central Seconds Hand
Distinguishing Technical Characteristics
Hand-Winding
Clockwise Balance Cock
Screw Regulator
Balance
Balance at 4:30
Barrel at 12:00
Production:  – 
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

Cal. 4S24 is a hand-winding movement central seconds. It was developed by Seiko in the early 1990s and is based on the Seiko 52 stream of movements, which had been retired in 1976. Cal. 4S24 is very similar to Cal. 4S28, which has a small seconds subdial rather than central seconds. It is also closely related to Cal. 4S15, which is an automatic movement with date.

Cal. 4S24 was rarely used but was notable as the movement in the Laurel historical reissue, catalog number LJAL601.

  • Seiko Laurel LJAL600 (twisted lugs, steel and gold, cream dial)
  • Seiko Laurel LJAL601 (twisted lugs, steel, white dial)
  • Seiko Laurel LJAL602 (plain lugs, steel, white dial)
  • Seiko Laurel LJAL603 (plain lugs, steel, black dial)
  • Seiko Laurel LJAL604 (plain lugs, steel, cream dial with Roman numerals)
  • 1998 Seiko Hand Winding SCVG004
  • 1998 Seiko Hand Winding SCVG005
  • 1998 Seiko Hand Winding SCVG007
This 1998 Seiko catalog shows the three SCVG models

Early Seiko 4S Movements

From the 1992 introduction of the Seiko 4S family through the early 2000s, Seiko used the 4S line as a high-end movement for diverse watches, including the SUS military, Alpinist, and Titanium diver. Most of these models were retired shortly after introduction, and the series of simple 4S movements was phased out by 2003.

ProductionWatchWindingJewelsNotes
4S121997-1998SCFFAutomatic25Date
Fixed 24 hour hand
4S151995-2001
2006
LHAM
SCFF
SCVF
SCVN
Automatic25Date
4S241990sLJAL
SCVG
Manual21
4S251993-1998SCVH
SCVJ
Automatic25Date
4S281994-2000LJAK
SCVG
SCVM
Manual24Small seconds at 6:00
4S351992-2000SCVKAutomatic25Date
4S711995-2003GCBBAutomatic25

External Link

Related Posts

ETA 2893-2

Seiko 4R35

Seiko 4R36

Chronoswiss C.125

Zenith 693

Chronoswiss C.124