Photo by Lucas D. on Unsplash
Seiko
Prospex Speedtimer (Compact Countdown)
DiveAffordable & Microbrand
$995
A GMT-style automatic Prospex built around a rotating 12-hour 'compact countdown' bezel, in a 39.5mm steel case with 200m water resistance -- not a chronograph despite the Speedtimer name.
View on Seiko official websiteCheck current price at retailer
May be an affiliate link — learn more about affiliate links.
- Collection
- Prospex
- Reference number
- SPB513J1
- Case material
- Stainless steel
- Case diameter
- 39.5 mm
- Case thickness
- 12 mm
- Lug width
- 20 mm
- Lug-to-lug
- 44.5 mm
- Movement
- Automatic
- Caliber
- 6R55
- Water resistance
- 200 m
- Power reserve
- 72 hours
- Release year
- 2025
- Country of origin
- Japan
Wrist size visualizer
Case diameter and lug-to-lug drawn to scale (4px per mm) against a millimeter ruler — hold a ruler or tape measure up to the screen to compare.
mm circumference
Lug-to-lug (44.5mm) is approximately 82% of your estimated flat wrist width (54mm). Well-proportioned for your wrist.
Price History
Down 17.1% ($205) since 10/3/2026.
Low $995 · High $1,200
- 10/5/2026$995▼ $205
- 10/3/2026$1,200
More from Seiko
Similar watches
Compare with similar →Other brands' watches around the same price.
