CWC (Cabot Watch Company) RN300 Automatic Diver Mk.1 Tritium Watch With Date
Finding alternatives to

CWC (Cabot Watch Company) RN300 Automatic Diver Mk.1 Tritium Watch With Date

57 watches that match on case size, movement family, and price band. Sorted by how close the match is.

Case
40mm
Movement
Automatic
MSRP
$3,174
The short answer

The closest alternative to the CWC (Cabot Watch Company) RN300 Automatic Diver Mk.1 Tritium Watch With Date is the Marathon OSAR-D (Original SAR with Date) Automatic 41mm ($1,800) — looks nearly identical and Automatic. If price is the constraint, the Aigi Watches 1RSU at $910 (vs $3,174 for the RN300 Automatic Diver Mk.1 Tritium Watch With Date) covers most of the same brief. From the independents, the MKII Stingray II is the standout microbrand take — looks nearly identical and Automatic. Stepping up, the Tudor Pelagos Ultra ($6,900) is where the same idea goes with a bigger budget.

57 matches
Microbrand picks· 12

Independent makers covering the same brief — usually with something the mainstream brands don't.

MKII
Stingray II
40mm · Automatic
Looks nearly identical · Automatic
Redwood Watches
Marine Engineer
40mm · Automatic$419
Looks nearly identical · Automatic
40mm · Automatic$3,240
Looks nearly identical · Automatic
Tornek-Rayville
TR-660 Acrylic Date
40mm · Automatic$999,491
Looks nearly identical · Automatic
Tornek-Rayville
TR-660 Acrylic Non-date
40mm · Automatic$999,491
Looks nearly identical · Automatic
Tornek-Rayville
TR-660 Aluminum Date
40mm · Automatic$999,445
Looks nearly identical · Automatic
Ventus Watches
Mori
41mm · Automatic$349
Looks nearly identical · Automatic
Yema
Superman Worldtime GMT
39mm · Automatic$1,549
Looks nearly identical · Automatic
Dan Henry
1970
40mm · Automatic$310
Looks nearly identical · Automatic
Islander
Islander Hudson "Harpoon Diver" 40mm Watch with Degrading Black Dial #ISL-302
40mm · Automatic$649
Looks nearly identical · Automatic
Lorier
Neptune SIV
39mm · Automatic$599
Looks nearly identical · Automatic
CWC
1980 RN Divers Automatic Re-Issue Watch
41mm · Automatic$2,458
Looks nearly identical · Automatic
Mainstream picks· 12

Established brands covering the same brief at a comparable price — same case size, similar movement family. Often the deciding click for a new buyer.

Marathon
OSAR-D (Original SAR with Date) Automatic 41mm
41mm · Automatic$1,800
Looks nearly identical · Automatic
Tudor
Black Bay Pro
39mm · Automatic$5,075
Looks nearly identical · Automatic
Tudor
Pelagos LHD
40mm · Automatic$6,025
Looks nearly identical · Automatic
Marathon
GSAR (Government Search & Rescue) Diver's Automatic
41mm · Automatic$2,100
Looks nearly identical · Automatic
Tudor
Black Bay GMT S&G
41mm · Automatic$5,825
Looks nearly identical · Automatic
Seiko
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
42.6mm · Automatic$3,600
Looks nearly identical · Automatic
Seiko
Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition
42mm · Automatic$1,750
Looks nearly identical · Automatic
Arethusa Watch Co
World Diver
40mm · Automatic
Looks nearly identical · Automatic
Glycine
Combat Sub Sport
39mm · Automatic$1,850
Looks nearly identical · Automatic
Bremont
S502
43mm · Automatic$5,100
Looks nearly identical · Automatic
Bremont
Supermarine 500M
43mm · Automatic$4,700
Looks nearly identical · Automatic
Linde Werdelin
Biformeter Elemental – Black Dial
44mm · Automatic$5,206
Looks nearly identical · Automatic
Cheaper alternatives· 12

If the price is the only thing keeping you off this watch, these get you most of the way there for less.

Aigi Watches
1RSU
40mm · Automatic$910
Looks nearly identical · Automatic
Aigi Watches
ARCTIC DIVER
41mm · Automatic$480
Looks nearly identical · Automatic
Aigi Watches
Arctic Diver Black Dive Watch
41mm · Automatic$480
Looks nearly identical · Automatic
Audaz
ADZ-3040
42mm · Automatic$550
Looks nearly identical · Automatic
Audaz
ADZ-3070
42mm · Automatic$700
Looks nearly identical · Automatic
Seiko
62MAS
40.5mm · Automatic$1,200
Looks nearly identical · Automatic
Audaz
Audaz Sea Ranger ADZ-2050
42mm · Automatic$375
Looks nearly identical · Automatic
Seiko
Prospex Sea
41mm · Automatic$900
Looks nearly identical · Automatic
Tissot
Seastar 1000
40mm · Automatic$875
Looks nearly identical · Automatic
Marathon
OSAR-D (Original SAR with Date) Automatic 36mm
36mm · Automatic$1,200
Looks nearly identical · Automatic
Seiko
Prospex Sea
41.3mm · Automatic$1,100
Looks nearly identical · Automatic
Hamilton
Khaki Navy Frogman Auto
41mm · Automatic$1,395
Looks nearly identical · Automatic
Pricier alternatives· 12

Where the same idea goes when budget isn't the constraint — luxury upgrades and step-ups.

Tudor
Pelagos Ultra
40mm · Automatic$6,900
Looks nearly identical · Automatic
Grand Seiko
SBGE253
40.5mm · Spring Drive$6,900
Visually similar · Same size
Bremont
Supermarine Chrono
43mm · Automatic$6,850
Looks nearly identical · Automatic
Tudor
Black Bay 58 18K
39mm · Automatic$22,550
Visually similar · Automatic
Grand Seiko
SLGA015
43.8mm · Spring Drive$12,600
Looks nearly identical · Diver-grade WR
Tudor
Black Bay Chrono S&G
41mm · Automatic$8,525
Visually similar · Automatic
Grand Seiko
SBGH289
43.8mm · Automatic$7,700
Visually similar · Automatic
Seiko
Prospex LX line
44.8mm · Spring Drive$6,500
Looks nearly identical · Pro-diver WR
Linde Werdelin
Oktopus Moon Gold Black Ink
44mm · Automatic$57,143
Visually similar · Automatic
Bremont
Hawking Limited Edition
41mm · Automatic$9,995
Visually similar · Automatic
Hublot
Spirit of Big Bang Titanium Diamonds 39mm
39mm · Automatic$20,400
Visually similar · Automatic
Linde Werdelin
Oktopus Moon 3DTP White Black Ink
44mm · Automatic$25,397
Visually similar · Automatic
Looks like this· 9

Visually-adjacent picks pulled by the image-similarity engine. Quality varies — sometimes a true twin, sometimes just a rhyme.

Pagani Design
PD-1755
40mm · Automatic$146
Looks nearly identical · Automatic
Pagani Design
PD-1694
40mm · Automatic$150
Looks nearly identical · Automatic
Pagani Design
PD-1693 GMT
42mm · Automatic$145
Looks nearly identical · Automatic
Sugess
Seestern 62MAS V3
39mm · Automatic$199
Looks nearly identical · Automatic
Sugess
Ocean Star S421
40mm · Automatic$449
Visually similar · Automatic
Sugess
Heritage S463 BB GMT
40mm · Automatic GMT$599
Looks nearly identical · Same size
Seestern
Sub 300 V4
42mm · Automatic$10
Visually similar · Automatic
Seestern
S446 GMT
39.5mm · Automatic GMT$299
Same size · 91% less
Seestern
S443 Column Wheel Chronograph
40mm · Manual$10
Visually similar · Same size