Seiko

Prospex — 1965 Heritage Diver

Ref. SPB453 · 40mm · Automatic · Stainless steel · MSRP $1,200.00

Market research

Authorized dealer

Asking $1,300–$1,300

full set · single_source

Official Seiko US retail price, confirmed direct from manufacturer site. No buy/sell derivation needed for a fixed retail price -- this is the number itself.

Sources: seikowatches.com official product page (SPB453J1), fetched directly

Secondary / used

Asking $1,100–$1,450

Suggested buy ~$1,000 · sell ~$1,300

full set · snippet_only

Chrono24 asking data here skews toward near-mint/dealer stock rather than a broad well-worn-used distribution -- treating tier as full_set, not a true bare/watch_only read. Trades close to the $1,300 AD price rather than at a discount, consistent with a currently-in-production, in-demand reference. Confidence is snippet_only, not cross_verified -- worked from aggregated search snippets, didn't fetch individual listing pages to confirm condition/completeness firsthand. Discount-from-asking assumption: 8-9%, standard for this price band.

Sources: Chrono24 search results (multiple 'Ref. SPB453J1' listings, mostly dealer-new-in-box, ~$949-1,600 spread); eBay search results (mix of new and one pre-owned full-kit sold listing)

Spec

Diameter
40mm
Lug width
20mm
Lug-to-lug
46.4mm
Case thickness
13mm
Movement
Automatic
Caliber
6R55
Case material
Stainless steel
Crystal
Sapphire (dual-curved, AR coating)
Dial color
Black
Complications
date
Water resistance
300m
Power reserve
72h
Jewels
24
Strap/bracelet
Bracelet
Clasp
Three-fold clasp with secure lock, push button release with extender

Source note

Spec backfill (2026-08-06): Revolution Watch + Teddy Baldassarre. Unresolved: case_material (near-certainly stainless steel for this line, not explicitly re-confirmed), bezel_type, strap_type/material, clasp_type, year_introduced, lug_width_mm. Spec backfill (2026-08-08, round 7): direct fetch of seikowatches.com's own product page for this exact reference (seikowatches.com/us-en/products/prospex/spb453j1) -- structured spec table gives "Case Material: Stainless steel", matching the existing note's suspicion, now positively re-confirmed rather than assumed. Cross-checked against Fratello Watches' launch coverage of the sibling trio SPB451/SPB453/SPB455, which confirms SPB453 (the standard black-dial model) ships on a stainless steel oyster-style bracelet with Seiko's super-hard coating -- same conclusion independently reached from multiple retailer listings (Teddy Baldassarre "Black on Bracelet", eBay listings showing bracelet). Bonus, confirmed via the same seikowatches.com fetch even though not in the missing-field list: lug_width_mm=20 ("Distance between lugs: 20", currently NULL on file) and clasp_type="Three-fold clasp with secure lock, push button release with extender" (also currently NULL). Case thickness (13.0mm), diameter (40.0mm), and lug-to-lug (46.4mm) already on file all matched exactly by Seiko's own spec table -- no conflicts. Seiko's own site lists $1,300 vs $1,200 on file -- close enough to read as a normal pricing-snapshot difference, not flagged, msrp untouched (not asked to fix). Unresolved: bezel_type (rotating bezel confirmed generically but no explicit 'unidirectional'/click-count spec found on this page), year_introduced.