Seiko
Prospex
SPB381
$1,500
MSRP
Specifications
Case Diameter
42mm
Lug to Lug
48.6mm
Thickness
12.9mm
Lug Width
20mm
Material
SS
Dial
Green
Movement
automatic
Caliber
6R54
Crystal
Sapphire
Strap
Bracelet
Pricing & Fit Summary
With a lug-to-lug measurement of 48.6mm, this reference is generally recommended for wrist sizes 14.6cm and larger. Note: fit is determined by lug-to-lug distance (48.6mm), not case diameter (42mm).
- 42mm
- Diameter
- 48.6mm
- Lug to Lug
- 12.9mm
- Thickness
- 20mm
- Lug Width
- Caliber
- 6R54
- Movement
- Automatic
- Crystal
- Sapphire
- Case Material
- SS
- Dial
- Green
- Strap
- Bracelet
- MSRP:
- $1,500
- Introduced:
- 2023
Perceived Size
How it wears, not just how it measures
~51mm
vs 49mm L2L
Compact (36mm)Substantial (60mm)
↑ 12.9mm case thickness adds +1.9mm wrist presence
Will this fit your wrist?
Slide to your wrist circumference to see the fit diagram.
Wrist circumference17 cm
12cm17cm (avg)22cm