Side by side

Tudor Black Bay One 31 S&GvsLongines FLAGSHIP CLASSIC

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
FLAGSHIP CLASSIC
LonginesFLAGSHIP CLASSIC
MSRP $2,700

At a glance

19 of 29 specs differ
Diameter
Black Bay One 31 S&G31mm
FLAGSHIP CLASSIC30mm
Power Reserve
Black Bay One 31 S&G50h
FLAGSHIP CLASSIC
Water Resistance
Black Bay One 31 S&G100m
FLAGSHIP CLASSIC30m
MSRP
Black Bay One 31 S&G$6,850
FLAGSHIP CLASSIC$2,700

Full specifications

Case

8 specs
Category
Diameter
31mm
30mm
Thickness
9.5mm
8.7mm
Lug-to-Lug
46mm
47mm
Lug Width
17mm
21mm
Finish
Polished + Satin
Water Resistance
100m
30m
Caseback
Solid screw-down

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Black
Green
Indices
Applied

Movement

6 specs
Caliber
MT5201
L888.5
Beat Rate
28,800 vph
0 vph
Power Reserve
50h
0h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$6,850
$2,700

Follow this matchup

Get a note when Tudor Black Bay One 31 S&G vs Longines FLAGSHIP CLASSIC gets more votes, a community discussion, or a price drop. No account needed.

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.

Longines FLAGSHIP CLASSIC

Owners widely praise the Longines FLAGSHIP CLASSIC for its quality execution, comfortable dimensions, and value, with many appreciating its classic styling and solid engineer bracelet. The 36mm and 38.5mm variants are considered ideal for a dress watch, offering understated elegance and impeccable finishing. One owner notes a smooth winding feel from the L629.2 movement, while another reports accuracy within +/- 5 seconds per day. However, the polished case is described as a smudge magnet, and the white Roman dial is not universally appealing. The 42-hour power reserve is flagged as a weaker characteristic by one reviewer. On balance, owners and reviewers rate the Longines FLAGSHIP CLASSIC highly for its neo-vintage design and build quality at its price point.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.