Seiko

Prospex Alpinist — Baby Alpinist

Ref. SPB155 · 38mm · Automatic (Caliber 6R35) · Stainless steel · MSRP $725.00

Market research

Grey market

Asking $699–$725

Suggested ceiling ~$699

full set · cross_verified

MSRP $725 on file matches the top of this range exactly. Cluster of Chrono24 third-party seller listings (not Seiko's own AD network, hence grey_market) all in the $699-725 band for new/like-new condition -- tight, consistent range. No suggested_sell -- want-list item, not a flip.

Sources: Chrono24 multiple seller listings (new/like-new, 2025-2026): $699, $725 (x3 separate listings), 2026-08-08

Spec

Diameter
38mm
Lug width
20mm
Movement
Automatic (Caliber 6R35)
Case material
Stainless steel
Crystal
Sapphire (curved, AR coating)
Dial color
Green
Water resistance
200m
Strap/bracelet
Bracelet

Source note

Spec backfill (2026-08-08, round 8): case_material Stainless steel, movement_type Automatic (Caliber 6R35, 70h power reserve), water_resistance_m 200, dial_color Green (textured, gold-plated indexes), crystal_type Sapphire (curved, AR coating), strap_type Bracelet (steel, 20mm, three-fold clasp) -- cross_verified across aBlogtoWatch review, the1881.ca product page, and multiple retailer listings (Lexor Miami, Exquisite Timepieces, Seiko Luxe), all for this exact reference SPB155.