A Classic from Seiko’s Golden Era
Check out this elegant Seiko Sportsmatic Calendar 820—a refined automatic timepiece from the 1960s featuring a silver sunburst dial, gold-plated case, and crisp faceted indices. It’s powered by Seiko’s 17-jewel Diashock movement and fitted with a custom CWM blue-green handmade leather strap for a premium vintage look.

✨ Recently serviced
🔧 Backed by a 3-month warranty
🟨 Gold-plated case | 🕰️ Date at 3 o’clock

A perfect blend of vintage charm and everyday reliability.

Brand: Seiko
Model: Sportsmatic Calendar 820
Movement: Automatic
Caliber: Likely Seiko Cal. 820 (Diashock, 17 jewels)
Jewels: 17
Functions: Time, central seconds, date window at 3 o’clock
Case Material: Gold-plated (20 microns typical for Seiko)
Case Diameter: Approx. 36mm (excluding crown)
Dial: Silver sunburst dial with gold-tone applied indices
Crystal: Acrylic dome
Crown: Recessed unsigned crown at 4 o’clock
Lug Width: 18mm
Strap: Comes with a custom handmade blue-green leather strap by CWM
Caseback: Stainless steel, screw-down
Era: Circa mid to late 1960s
Country of Origin: Japan

Notes and Highlights:
Classic vintage Seiko design with elegant dauphine hands and faceted indices.

The “Calendar 820” variant is known for its slim profile and excellent wrist presence.

Recently serviced by an in-house technician for smooth operation.

Comes with a 3-month warranty for your peace of mind.

The dial and gold-tone case are in great condition, with only minimal signs of aging.

A reliable vintage daily wearer with timeless style and Seiko’s early automatic heritage.