Which is cheaper, the Bernhardt The Cipher Diver or the Seiko Prospex Sea?

At MSRP the Seiko Prospex Sea is the cheaper of the two at $625, against $795 for the Bernhardt The Cipher Diver — a $170 gap before any retailer discounting.

Which is bigger, the Bernhardt The Cipher Diver or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 43.8mm versus 39mm for the Bernhardt The Cipher Diver — a 4.8mm difference across the dial.

Which has better water resistance, the Bernhardt The Cipher Diver or the Seiko Prospex Sea?

The Bernhardt The Cipher Diver is rated to 300m versus 200m for the Seiko Prospex Sea.

What movement does the Bernhardt The Cipher Diver run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the Bernhardt The Cipher Diver uses the Miyota 9039 and the Seiko Prospex Sea uses the Seiko 4R35.

Side by side

Bernhardt The Cipher DivervsSeiko Prospex Sea

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

Add a watch

Bernhardt The Cipher Diver

the-cipher-diver-bg-fall-2026-pre-order

MSRP $795

See the full The Cipher Diver

Seiko Prospex Sea

MSRP $625

See the full Prospex Sea

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

At a glance

13 of 29 specs differ

Diameter

The Cipher Diver39mm

Prospex Sea43.8mm

Power Reserve

The Cipher Diver—

Prospex Sea41h

Water Resistance

The Cipher Diver300m

Prospex Sea200m

MSRP

The Cipher Diver$795

Prospex Sea$625

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

—

Anti-reflective coating on inner surface

Dial Color

—

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Miyota 9039

Seiko 4R35

Power Reserve

41h

Jewels

Pricing

1 specs

MSRP

$795

$625

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.

Mark Time Watchesmicro

DiscussionNot started

Adjacent matchups

People also compared

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

Carlingue Timepieces CARL-DIV-01 / CT-001-AvsSeiko Prospex Sea Seiko Prospex SeavsVertigo Watches Hippocampus Baltic Aquascaphe Dual-CrownvsSeiko Prospex Sea Alkin Watches Model Three DivervsSeiko Prospex Sea Bernhardt The Cipher DivervsSpinnaker Hass Automatic Bernhardt The Cipher DivervsBoldr Odyssey Original

Edit this comparison Add another watch Explore more 38–45mm watches

Bernhardt The Cipher DivervsSeiko Prospex Sea

At a glance

Full specifications

More watches worth a look

M 4

Jamanta

Penfold

Tesei Forged Carbon

Verimatic 39mm

Fleuss

Hakusan / Hamana Dial

Great White 43

People also compared