Side by side

Ralf Tech WRB AUTOMATIC METALvsSeiko Prospex Sea The Black Series

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Add a watch
WRB AUTOMATIC METAL
Ralf TechWRB AUTOMATIC METAL
MSRP $2,290
See the full WRB AUTOMATIC METAL
Prospex Sea The Black Series
SeikoProspex Sea The Black Series
MSRP $765
See the full Prospex Sea The Black Series
Buy from Ralf Tech ↗
Buy used on eBay ↗
Buy from Seiko ↗
Buy used on eBay ↗

At a glance

11 of 29 specs differ
Diameter
WRB AUTOMATIC METAL39mm
Prospex Sea The Black Series45mm
Power Reserve
WRB AUTOMATIC METAL40 hoursh
Prospex Sea The Black Series41h
Water Resistance
WRB AUTOMATIC METAL200m
Prospex Sea The Black Series200m
MSRP
WRB AUTOMATIC METAL$2,290
Prospex Sea The Black Series$765

Full specifications

Case

5 specs
Category
—
Diver
Diameter
39mm
45mm
Thickness
12mm
13.2mm
Lug-to-Lug
46mm
47.7mm
Lug Width
20mm
22mm

Crystal & Dial

2 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
RTA003
Seiko 4R36
Power Reserve
40 hoursh
41h
Jewels
25
24

Pricing

1 specs
MSRP
$2,290
$765
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Ralf Tech ACADÉMIE AUTOMATIC WRB dive 41mm 3-hand (serrated 60-min rotating dive bezel, crown @4 with guards)
Ralf Techmicro

ACADÉMIE AUTOMATIC WRB dive 41mm 3-hand (serrated 60-min rotating dive bezel, crown @4 with guards)

8 variantsRef.
41mm·Automatic·200m WR
$2,080MSRP
—Used
Spinnaker Wreck Automatic
Spinnakermicro

Wreck Automatic

4 variantsWreck
44mm·Automatic·200m WR
$189MSRP
—Used
Lima Watch Meca Revolt Meca/Seconde 38mm cushion small-seconds subdial
Lima Watchmicro

Meca Revolt Meca/Seconde 38mm cushion small-seconds subdial

5 variantsRef.
38mm·Automatic·200m WR
$275MSRP
—Used
Marathon OSAR-D (Original SAR with Date) Automatic 46mm
Marathonmicro

OSAR-D (Original SAR with Date) Automatic 46mm

6 watches · 6 variantsOSAR
46mm·Automatic·300m WR
$2,500MSRP
—Used
Marnaut Safe Harbour 100C Safe Harbour Classic 100 (cushion case, multi-subdial complication, applied batons)
Marnautmicro

Safe Harbour 100C Safe Harbour Classic 100 (cushion case, multi-subdial complication, applied batons)

39/40mm
39/40mm·Automatic·100m WR
$1,042MSRP
—Used
Boldr Odyssey Regatta
Boldrmicro

Odyssey Regatta

Ref. odyssey-regatta-admiral-blue
45.5mm·Automatic·500m WR
$1,499MSRP
—Used
Radcliffe Watches X M-DVR
Radcliffe Watchesmicro

X M-DVR

39mm·Automatic·200m WR
$418MSRP
—Used
Spinnaker Dumas Automatic
Spinnakermicro

Dumas Automatic

2 watches · 20 variantsDumas
44mm·Automatic·300m WR
$239MSRP
—Used
All alternatives to the WRB AUTOMATIC METAL →All alternatives to the Prospex Sea The Black Series →
Explore the full catalog

Follow this matchup

Get a note when Ralf Tech WRB AUTOMATIC METAL vs Seiko Prospex Sea The Black Series gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Ralf Tech ACADÉMIE AUTOMATIC WRB dive 41mm 3-hand (serrated 60-min rotating dive bezel, crown @4 with guards)vsSeiko Prospex Sea The Black SeriesAlsta SuperautomaticvsSeiko Prospex Sea The Black SeriesMarnaut Safe Harbour 100C Safe Harbour Classic 100 (cushion case, multi-subdial complication, applied batons)vsSeiko Prospex Sea The Black SeriesRalf Tech WRV AUTOMATIC 1977vsSeiko Prospex Sea The Black SeriesEsoteric Watches Bathyal SolvsRalf Tech WRB AUTOMATIC METALDuxot TortugavsRalf Tech WRB AUTOMATIC METAL
Edit this comparisonAdd another watchExplore more 38–46mm watches