Seiko - Chronos Textured Tank - 9021-5140 JDM definitively dating this unit to

definitively dating this unit to the height of the "Mad Men" era of horology

an elite hybrid engine highly revered by technical purists for its integrated capacitor that stores electrical energy generated purely by your wrist movements

resulting in a second hand that sweeps with the same buttery smoothness found in premium mechanical chronometers

Brand Seiko Model Seiko Quartz QT REFERENCE /SKU 3803 - 7020 / 1008 YEAR 1974 MATERIAL Stainless-Steel WINDING Quartz CALIBER 3803 SERIAL 222798 CASE SIZE WITHOUT CROWN  35mm CASE SIZE WITH CROWN 37mm CASE THICKNESS 11mm BETWEEN LUGS 18mm SERVICE Serviced STRAP Leather

which has had a long-lasting effect on the industry

Seiko - Chronos Textured Tank - 9021-5140 JDM definitively dating this unit toThis timepiece is a magnificent artifact from December 1987, as definitively proven by the serial number 701240. he Chronos line was introduced by Seiko in the 1980s as a highly refined collection bridging daily wearability with high end, geometric design cues. This reference houses the ultra slim Caliber 9021, a technical soul engineered for a thin profile that allows the Tank style case to sit seamlessly against the wrist. The architecture is