Seiko 5 6319-5020 Men's Square Automatic Watch

A square dial opening and broad 22 mm strap fit give this 1977 Seiko 5 a strongly geometric presence. Reference 6319-5020 pairs a softly tonneau-shaped steel exterior with a silver sunburst dial and dark-accented batons. Automatic caliber 6319 supplies the day-date display, and a new high-quality black leather strap completes the watch.

Square opening and brushed case planes

The case places a square dial opening inside a softer tonneau-like outline. Broad brushed upper surfaces emphasize the geometry, with polished transitions along the edges adding brighter reflections. This relationship between the straight opening and curved exterior is the principal shape detail of the reference.

At 36 mm wide and 41 mm from lug to lug, the steel case has a compact central footprint. Its 22 mm lug width creates a substantial strap stance beside that width. For fit, the overall lug span and broad strap attachment are useful alongside the nominal case size.

The acrylic crystal follows the shaped opening. A proportionate knurled crown sits at 3 o’clock, close to the mid-case, and the caseback engravings identify the reference and caliber family.

Silver dial with dark baton accents

The dial of this vintage Seiko watch has a fine brushed sunburst effect, with applied baton markers containing dark inlays. The silver surface picks up light while the darker inserts preserve contrast. A framed day-date aperture at 3 balances the right side of the layout.

The Seiko 5 shield and Automatic 21 Jewels printing identify the line and movement specification. Dark baton hour and minute hands have light central fill, accompanied by a slim central seconds hand. Their straight forms repeat the marker shapes and suit the square dial opening.

Black leather and automatic caliber 6319

The new high-quality black leather strap emphasizes the contrast between the bright case and silver dial. Its broad 22 mm fitting continues the case’s strong geometry at the wrist. The strap is a replacement accessory; the watch-head components are original.

Seiko caliber 6319 is a 21-jewel automatic movement operating at 21,600 vibrations per hour, or 3 Hz. It powers hours, minutes, central seconds, day and date.

This used example retains light signs of age. It is fully serviced and fully operational, comes with a 12-month warranty, and is available with worldwide shipping.