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Otsuka Lotec watches

4 recorded watches across 4 model names. Open a model to compare references and recorded specifications.

Otsuka Lotec brand history →

4 models · 4 records

No. 51 record
No. 5 KAI1 record

No. 5 KAI

No. 5 KAI.

Case · Material
316L stainless steel
Case · Diameter
40.5 mm
Case · Thickness
12.2 mm (including crystal)
Case · Water resistance
3 ATM (original manufacturer rating)
Movement · Calibre
90S5
Movement · Winding
automatic
Movement · Power reserve
40 hours (approximately; brand claim)
Movement · Functions
satellite hours (source_stated); minutes (source_stated); seconds disc
Strap or bracelet · Material
calfskin
Strap or bracelet · Width
22 mm

Sources: No. 5 KAI

No. 81 record

No. 8

No. 8.

Case · Material
316L stainless steel
Case · Width
31 mm
Case · Thickness
10.8 mm (including crystal)
Case · Water resistance
3 ATM (original manufacturer rating)
Movement · Calibre
90S5
Movement · Winding
automatic
Movement · Power reserve
32 hours (approximately; brand claim)
Movement · Functions
jumping hours (source_stated); flywheel-linked retrograde minutes (source_stated); 90-second running disc
Strap or bracelet · Material
rubber
Strap or bracelet · Width
24 mm

Sources: No. 8

No. 91 record

No. 9

No. 9.

Case · Material
316L stainless steel and sapphire
Case · Width
30 mm
Case · Thickness
13 mm (maximum)
Case · Water resistance
3 ATM (original manufacturer rating)
Movement · Calibre
SSGT
Movement · Winding
manual
Movement · Power reserve
40 hours (approximately; brand claim)
Movement · Functions
jumping hours (source_stated); rewinding minutes (source_stated); tourbillon (source_stated); hour striking (source_stated); power reserve indicator
Strap or bracelet · Material
calfskin
Strap or bracelet · Width
26 mm

Sources: No. 9 and Cal. SSGT

Most entries are research catalogue records, not independently reviewed articles. Specifications reflect the linked sources and may be incomplete or change by reference. The ten reviewed dossiers are marked above.