Bell & Ross BR-X1 Tourbillon RS17vsOmega Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Bell & Ross BR-X1 Tourbillon RS17 at true scale

BR-X1 Tourbillon RS17

Omega Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm at true scale

Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm

Diameter

45mm

44.3mm

Lug-to-Lug

n/a

50mm

Thickness

n/a

16.9mm

Water Resistance

100m

100m

Power Reserve

n/a

60h

MSRP

$171,720

$42,400

lowest

Movement

Bell & Ross BR-CAL.283

Omega 9904

Case

7 specs
Diameter
45mm
44.25mm
Thickness
n/a
16.85mm
Lug-to-Lug
n/a
50mm
Lug Width
n/a
21mm
Material
Ceramic
18kt Sedna Gold
Finish
n/a
Steel
Caseback
n/a
n/a

Crystal & Dial

5 specs
Crystal Shape
n/a
Domed
AR Coating
Underside
n/a
Dial Color
Grey
Black
Indices
Applied indices
n/a
Lume
Super-LumiNova
None

Movement

8 specs
Caliber
Bell & Ross BR-CAL.283
Omega 9904
Type
Manual
Automatic
Beat Rate
n/a
0 vph
Power Reserve
n/a
60h
Jewels
n/a
0
Hacking
No
Yes
Hand-winding
No
Yes
Complications
Hours/Minutes, Chronograph, Power Reserve Indicator, Tourbillon
Chronograph, Moonphase

Pricing

1 specs
MSRP
$171,720
$42,400
Keep your wishlist and collection together in the appExplore the app

Reviews

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

Bell & Ross BR-X1 Tourbillon RS17

Owners widely report a niche, futuristic, and industrial design for the Bell & Ross BR-X1 TOURBILLON RS17, with good readability despite its skeletonization, though some find its aesthetic dated and its square case design awkward. One owner wishes for a larger date window. The watch features a manually wound caliber BR-CAL.283 with a 4-day power reserve and 100m water resistance. On balance, owners and reviewers acknowledge the Bell & Ross BR-X1 TOURBILLON RS17's distinctive design but are divided on its overall aesthetic appeal.

Omega Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm

The Omega Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm is widely praised for its detailed and photorealistic moonphase complication, featuring a boot print Easter egg, and its exceptional finishing, including a ceramic bezel and sun-brushed dial. Owners and reviewers consistently highlight the beauty of the complication and the overall build quality. However, the watch's 44.25mm case size and considerable thickness (around 16.85mm to 17mm) are frequently noted as making it wear large and potentially challenging to fit under dress cuffs, with some suggesting it feels "chunky" or like a "beast." One reviewer found the crown guards sharp when winding and the crown difficult to pull out. On balance, owners and reviewers appreciate the Omega Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm for its stunning moonphase detail and high-end finishing, despite its substantial size.