Side by side

Helgray Poseidon Diver (Automatic)vsTudor Black Bay

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

Poseidon Diver (Automatic)
HelgrayPoseidon Diver (Automatic)
MSRP $249
Black Bay
TudorBlack Bay

At a glance

9 of 29 specs differ
Diameter
Poseidon Diver (Automatic)40mm
Black Bay41mm
Power Reserve
Poseidon Diver (Automatic)40h
Black Bay70h
Water Resistance
Poseidon Diver (Automatic)300m
Black Bay200m
MSRP
Poseidon Diver (Automatic)$249
Black Bay—

Full specifications

Case

6 specs
Diameter
40mm
41mm
Thickness
12mm
14.7mm
Lug Width
20mm
22mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
200m
Caseback
Solid
Engraved

Movement

2 specs
Caliber
NH35 Warranty
MT5602
Power Reserve
40h
70h

Pricing

1 specs
MSRP
$249
—

Follow this matchup

Get a note when Helgray Poseidon Diver (Automatic) vs Tudor Black Bay gets more votes, a community discussion, or a price drop. No account needed.

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.

Galo Super200 Dark Edition
Galomicro

Super200 Dark Edition

2 watches · 6 variantsSuper200
39mm·Automatic·200m WR
$488MSRP
—Used
Islander Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323
Islandermicro
Under $50

Islander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323

9 watches · 9 variantsUnder $50
42mm·Automatic·200m WR
$449MSRP
—Used
Vaer D5 Tropic Auto
Vaermicro
Tropic

D5 Tropic Auto

Ref. d5-tropic-usa-diver
39mm·Automatic·200m WR
$699MSRP
—Used
Bremont Supermarine 300M
Bremontmicro

Supermarine 300M

8 watches · 39 variantsSupermarine
40mm·Automatic·300m WR
$3,550MSRP
—Used
Christopher Ward C60 Lympstone
Christopher Wardmicro

C60 Lympstone

6 watches · 9 variantsC60
40mm·Automatic·600m WR
$1,615MSRP
—Used
Islander Islander Luminous Wave Dial Automatic Dive Watch with AR Double-Dome Sapphire Crystal, and Luminous Ceramic Bezel Insert #ISL-62
Islandermicro
Dive Watches Guide

Islander Luminous Wave Dial Automatic Dive Watch with AR Double-Dome Sapphire Crystal, and Luminous Ceramic Bezel Insert #ISL-62

7 watches · 7 variantsDive Watches Guide
42mm·Automatic·200m WR
$420MSRP
—Used
Spinnaker Spence 300
Spinnakermicro

Spence 300

11 variantsSpence
40mm·Automatic·300m WR
$650MSRP
—Used
CWC RN Automatic Divers Watch Mk.2
CWCmicro
RN Divers

RN Automatic Divers Watch Mk.2

Ref. cwc-royal-navy-diver-automatic-mk2
41mm·Automatic·300m WR
$1,249MSRP
—Used
All alternatives to the Poseidon Diver (Automatic) →All alternatives to the Black Bay →
Explore the full catalog
Adjacent matchups

People also compared

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

Galo Super200 Dark EditionvsTudor Black BayTudor Black BayvsVaer D5 Tropic AutoBremont Supermarine 300MvsTudor Black BayIslander Hudson "Harpoon Diver" 40mm Watch with Degrading Black Dial #ISL-302vsTudor Black BayIslander Red October V2 Dive Watch with Radiant Blue Dial #ISL-323vsHelgray Poseidon Diver (Automatic)Bremont Supermarine 300MvsHelgray Poseidon Diver (Automatic)
Edit this comparisonAdd another watchMore diver comparisonsBest Diver Watches Under $5,000Explore more 39–42mm watches