Which is cheaper, the Bernhardt The Cipher Diver or the Seiko 5KX?

At MSRP the Seiko 5KX is the cheaper of the two at $350, against $795 for the Bernhardt The Cipher Diver — a $445 gap before any retailer discounting.

Which is bigger, the Bernhardt The Cipher Diver or the Seiko 5KX?

The Seiko 5KX wears larger at 42.5mm versus 39mm for the Bernhardt The Cipher Diver — a 3.5mm difference across the dial.

Which has better water resistance, the Bernhardt The Cipher Diver or the Seiko 5KX?

The Bernhardt The Cipher Diver is rated to 300m versus 10m for the Seiko 5KX.

What movement does the Bernhardt The Cipher Diver run compared to the Seiko 5KX?

Both watches run automatic movements — the Bernhardt The Cipher Diver uses the Miyota 9039 and the Seiko 5KX uses the Seiko 4R36.

Side by side

Bernhardt The Cipher DivervsSeiko 5KX

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

MSRP $350

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

At a glance

12 of 29 specs differ

Diameter

The Cipher Diver39mm

5KX42.5mm

Power Reserve

The Cipher Diver—

5KX41h

Water Resistance

The Cipher Diver300m

5KX100m

MSRP

The Cipher Diver$795

5KX$350

Full specifications

Case

5 specs

Crystal & Dial

3 specs

Crystal

Sapphire

Hardlex

Dial Color

—

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Miyota 9039

Seiko 4R36

Power Reserve

41h

Jewels

Pricing

1 specs

MSRP

$795

$350

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 5KX Seiko 5KXvsVertigo Watches Hippocampus Baltic Aquascaphe Dual-CrownvsSeiko 5KX Alkin Watches Model Three DivervsSeiko 5KX Bernhardt The Cipher DivervsBorealis Watch Co. Caloura 300m Bernhardt The Cipher DivervsSpinnaker Croft Pioneer

Edit this comparison Add another watch Explore more 38–44mm watches

Bernhardt The Cipher DivervsSeiko 5KX

At a glance

Full specifications

More watches worth a look

M 4

Hull Commander

Penfold

Jamanta

Verimatic 39mm

Caloura 300m

Hakusan / Hamana Dial

Fleuss

People also compared