Side by side

RGM Watches Model 300 DiversvsSinn U18

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

Model 300 Divers
RGM WatchesModel 300 Divers
MSRP $4,450
U18
SinnU18
MSRP $3,488
What people say

Owners + reviewers, side by side

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

RGM Watches Model 300 Divers

Owners widely praise the RGM Watches Model 300 Divers for its outstanding quality, typical of RGM, and its rugged, cool appearance. Some owners note its 17mm thickness and small dial, with one comparison suggesting its quality does not match that of Omega. The watch is available with a bracelet in outstanding condition and an OEM rubber strap showing minor wear. On balance, owners rate the RGM Watches Model 300 Divers highly for its build quality and distinctive aesthetic.

Sinn U18

The Sinn U18 is praised for its unique deep blue/green dial with three-dimensional oxygen bubbles that change with light, and its comfortable, easily adjustable bracelet. Owners find the watch stunning and a piece of history, appreciating the refined hands. The Sinn U18 features a 44mm, 15.5mm thick case made from German submarine steel, offering a 2000-meter dive specification and Sinn's Ar-Dehumidifying technology, powered by a Sellita SW300-1 movement. The case thickness is apparent, and the watch comes as a complete set with box and papers for $3,000-$3,680. On balance, owners and reviewers rate the Sinn U18 highly for its striking dial and robust build.

At a glance

13 of 29 specs differ
Diameter
Model 300 Divers43.5mm
U1844mm
Power Reserve
Model 300 Divers40h
U1842h
Water Resistance
Model 300 Divers762m
U182,000m
MSRP
Model 300 Divers$4,450
U18$3,488

Full specifications

Case

8 specs
Category
Diver
Diameter
43.5mm
44mm
Thickness
17mm
15.5mm
Lug-to-Lug
46mm
Material
Stainless Steel
high-strength
Finish
Brushed and polished
Water Resistance
762m
2000m
Caseback
Solid

Crystal & Dial

3 specs
Crystal Shape
Flat
AR Coating
Inner
Indices
Applied

Movement

1 specs
Power Reserve
40h
42h

Pricing

1 specs
MSRP
$4,450
$3,488
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