Side by side

Oris Big Crown DiamondsvsSeestern S450 Ocean Star

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

Big Crown Diamonds
OrisBig Crown Diamonds
MSRP $3,300
S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299

At a glance

20 of 29 specs differ
Diameter
Big Crown Diamonds34mm
S450 Ocean Star40mm
Power Reserve
Big Crown Diamonds42 hoursh
S450 Ocean Star41h
Water Resistance
Big Crown Diamonds50m
S450 Ocean Star100m
MSRP
Big Crown Diamonds$3,300
S450 Ocean Star$299

Full specifications

Case

9 specs
Category
Diver
Diameter
34mm
40mm
Thickness
12mm
Lug-to-Lug
48mm
Lug Width
17mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
50m
100m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Underside
Inner
Dial Color
Black
White
Indices
Applied
Lume
None
Tritium

Movement

5 specs
Caliber
531
TMI NH35A
Beat Rate
4 vph
21,600 vph
Power Reserve
42 hoursh
41h
Jewels
24
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$3,300
$299

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Oris Big Crown Diamonds

Owners widely praise the Oris Big Crown Diamonds for its timeless design, vintage charm, and recognizable details like cathedral hands and the pointer date function. Reviewers highlight the stunning gradient dial and the "Bullseye" tuxedo dial as particularly beautiful. The 38mm case is considered versatile, and the watch offers remarkable value. However, some owners note the standard Sellita movement has a short power reserve and plain finishing, and the strap is not durable. A reviewer points out slightly imperfect Super-LumiNova printing on the hour numerals, and one owner finds the two-tone bracelet overly flashy. On balance, owners and reviewers rate the Oris Big Crown Diamonds highly for its unique design and value at its price point.

Seestern S450 Ocean Star

Owners widely praise the Seestern S450 Ocean Star's Yachtmaster-style case and flawless bracelet finishing, with one owner noting the ST2130 movement keeps good time. The bezel action is described as having individual notches but feeling like a friction bezel, while another owner flags the bezel and crown action as smooth with perfect alignment. Lume is a point of contention, with one source describing it as a nice cool blue with ice-white application, while others note it as weak or not matching Prospex standards, despite using BGW-9. The watch is considered a "big boy" ideal for larger wrists (19cm+), potentially too large for 17cm wrists due to its size and non-tapering bracelet. Overall, owners rate the Seestern S450 Ocean Star highly for its build quality and finishing at the price point, despite some reservations about its size and lume intensity.

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