Side by side

Tudor Black Bay One 31 S&GvsLongines LONGINES SPIRIT ZULU TIME

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
LONGINES SPIRIT ZULU TIME
LonginesLONGINES SPIRIT ZULU TIME
MSRP $5,200

At a glance

11 of 29 specs differ
Diameter
Black Bay One 31 S&G31mm
LONGINES SPIRIT ZULU TIME39mm
Power Reserve
Black Bay One 31 S&G50h
LONGINES SPIRIT ZULU TIME40h
Water Resistance
Black Bay One 31 S&G100m
LONGINES SPIRIT ZULU TIME100m
MSRP
Black Bay One 31 S&G$6,850
LONGINES SPIRIT ZULU TIME$5,200

Full specifications

Case

7 specs
Category
GMT
Diameter
31mm
39mm
Thickness
9.5mm
13.5mm
Lug-to-Lug
46mm
46.8mm
Lug Width
17mm
21mm
Finish
Polished + Satin
Brushed and polished
Caseback
Solid screw-down
Solid

Crystal & Dial

1 specs
Dial Color
Black
Anthracite

Movement

2 specs
Caliber
MT5201
L844.4
Power Reserve
50h
40h

Pricing

1 specs
MSRP
$6,850
$5,200

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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.

LONGINES SPIRIT ZULU TIME

Owners widely praise the Longines Spirit Zulu Time for its superb finishing, smooth crown action, and mesmerizing ceramic bezel, with many noting its premium pilot/sporty design and unique dial details. The movement is consistently lauded for its extreme accuracy, running at 0 to +1 second per day, and the watch is considered to offer remarkable value that punches above its price point. However, the bracelet is criticized by multiple sources for its push-pin adjustment and limited micro-adjustment holes, and the 42mm case size with a 49.3mm lug-to-lug is noted as potentially large for smaller wrists, though some users express a preference for the 39mm size. One owner reported their movement failed within the first year and found setting the date a "nightmare," while another owner notes minor criticisms like the date window being slightly off-center. On balance, owners and reviewers rate the Longines Spirit Zulu Time highly for its impressive finishing and accuracy at its price point.

From video reviewers

The 39mm case size is a significant strength, addressing previous concerns about thickness. The value proposition within the GMT market is also a shared positive point. No consensus on weaknesses was reached.

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