Side by side

Tudor Black Bay One 31 S&GvsYema Navygraf CMM.10

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

Black Bay One 31 S&G
TudorBlack Bay One 31 S&G
MSRP $6,850
Navygraf CMM.10
YemaNavygraf CMM.10
MSRP $1,899

At a glance

12 of 29 specs differ
Diameter
Black Bay One 31 S&G31mm
Navygraf CMM.1039mm
Power Reserve
Black Bay One 31 S&G50h
Navygraf CMM.1040h
Water Resistance
Black Bay One 31 S&G100m
Navygraf CMM.10100m
MSRP
Black Bay One 31 S&G$6,850
Navygraf CMM.10$1,899

Full specifications

Case

7 specs
Category
Diver
Diameter
31mm
39mm
Thickness
9.5mm
11mm
Lug Width
17mm
19mm
Material
Stainless Steel
316L Stainless Steel
Finish
Polished + Satin
Brushed and polished
Caseback
Solid screw-down
Solid

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Black
Standard

Movement

2 specs
Caliber
MT5201
Yema CMM.10
Power Reserve
50h
40h

Pricing

1 specs
MSRP
$6,850
$1,899

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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.

Tudor Black Bay One 31 S&G

The Tudor Black Bay One 31 S&G is praised for its quiet luxury, combining brushed steel and warm gold accents for understated charm. Owners appreciate the brushed gold for a casual two-tone look and the champagne dial's surprising legibility. Some find the case sides too thick, and one user expressed a desire for a smaller S&G variant. The watch features the MT5612 movement with a 70-hour power reserve and a date function, within a 200-meter water-resistant case. Overall, owners and reviewers highlight the Tudor Black Bay One 31 S&G's balanced two-tone aesthetic as its primary appeal.

Yema Navygraf CMM.10

Owners widely report quality control concerns and suspect craftsmanship with the Yema Navygraf, with one user noting crooked text. A reviewer praised the Slim CMM.20 Limited Edition for its stylish, slim profile and classy finishing on a black lacquered enamel dial, though the audible micro-rotor spinning at its price point was a surprise. On balance, the consensus is that while the Yema Navygraf offers a stylish design, potential buyers should be aware of reported quality control issues.

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