Seiko

Prospex — Heritage Diver Charcoal

Ref. SPB143 · 40mm · Automatic · Stainless steel · MSRP $1,250.00

Market research

Authorized dealer

Asking $1,049–$1,250

full set · single_source

No suggested buy/sell -- retail range only.

Sources: Retailer listing $1,049; catalog's existing MSRP ($1,250) included as the upper end of the range -- official seikowatches.com price itself wasn't directly retrievable in this pass.

Secondary / used

Asking $800–$960

Suggested buy ~$820 · sell ~$920

full set · single_source

Aggregate figure, not individually verified sold listings -- held to single_source despite being recent.

Sources: Aggregated secondary-market range ($800-960), dated July 2026 -- recent. Individual comps: Chrono24 $1,003 (labeled 'new', likely grey/dealer stock not a true used comp, excluded), eBay ~$868 (CAD-converted).

Spec

Diameter
40mm
Lug width
20mm
Lug-to-lug
47.6mm
Case thickness
13.2mm
Movement
Automatic
Caliber
6R35
Case material
Stainless steel
Bezel
Unidirectional rotating
Crystal
Sapphire
Dial color
Charcoal
Complications
date
Water resistance
200m
Power reserve
70h
Jewels
24
Strap/bracelet
Bracelet
Strap material
Stainless steel
Clasp
Folding clasp with diving extension

Source note

Cross-verified via Moyer Fine Jewelers, Laviano Jewelers, Teddy Baldassarre review, Seiko's own seikowatches.com regional listing, Exquisite Timepieces review. Clasp described specifically as a basic tension-based three-fold clasp with dive extension, not push-button -- worded to avoid overclaiming a feature it doesn't have. diameter_mm already on file (40.0mm) vs. 40.5mm found here -- within normal measurement variance, not changed.