Deskripsi

SPECIFICATION

Circa: 1967
Movement: Cal 2118 Manual-winding
Jewel Count: 21 Jewels
Beat Rate: 19,800 to 21,600 vibrations per hour (vph) (Providing a smooth sweep of the central seconds hand).
Complication: Date calendar display located at the 6 o’clock position
Shock Protection: Seiko Diashock system, which protects the balance staff pivots against impact from sudden drops
Case Width: 17.5mm (Measured horizontally across the case, excluding the winding crown).
Lug-to-Lug: 30mm
Lug Width: 15mm
Case Thickness: 10mm
Case Material: PDP (Palladium Plated) Stainless Steel

CONDITION

Very Good Vintage Condition. Dial is clean. Case is like new.. Back case is in very good condition. Strap has been replace with aftermarket genuine leather but still uses its original buckle. Movement runs perfectly fine and has good power reserve.

COLLECTOR’S NOTES

The “Daini” Heritage
This watch features the stylized lightning bolt symbol on the dial, which is the historical maker’s mark of the Daini Seikosha factory in Tokyo. During the 1960s, Daini engaged in a legendary internal rivalry with the Suwa Seikosha factory to push the limits of mechanical engineering.

The High-Jewel Ladies’ Era
Mid-century ladies’ watches are often undervalued today, but they represent a pinnacle of micro-engineering. Fitting a 21-jewel calendar movement into a tiny 17.5mm wide case required extraordinary precision.

The “Tank” Form Factor
While many mid-century ladies’ watches were round or cocktail-styled, the rectangular “Tank” geometry makes this specific reference heavily sought after by enthusiasts looking for a classic, geometric, unisex-adjacent art deco aesthetic

Palladium Build Material
The case back on this specific reference series often integrates high-grade Palladium plating—a rare material choice in mid-century horology that offers excellent tarnish resistance compared to typical base metals.