Side by side

Glycine Combat Sub Sport GMTvsTudor Black Bay 58 GMT

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

Combat Sub Sport GMT
GlycineCombat Sub Sport GMT
MSRP $2,995
Black Bay 58 GMT
TudorBlack Bay 58 GMT
MSRP $5,525

At a glance

18 of 29 specs differ
Diameter
Combat Sub Sport GMT42mm
Black Bay 58 GMT39mm
Power Reserve
Combat Sub Sport GMT48h
Black Bay 58 GMT65h
Water Resistance
Combat Sub Sport GMT200m
Black Bay 58 GMT200m
MSRP
Combat Sub Sport GMT$2,995
Black Bay 58 GMT$5,525

Full specifications

Case

5 specs
Diameter
42mm
39mm
Thickness
10.85mm
12.8mm
Lug Width
22mm
12.8mm
Finish
Polished + Satin
Caseback
Solid screw-down

Crystal & Dial

5 specs
Crystal Shape
AR Coating
Dial Color
Blue
Black
Indices
Applied
Lume
Luminous
None

Movement

7 specs
Caliber
SW330-2
MT5450-U
Beat Rate
28,800 vph
0 vph
Power Reserve
48h
65h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
GMT, Date
GMT

Pricing

1 specs
MSRP
$2,995
$5,525

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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.

Glycine Combat Sub Sport GMT

Owners widely praise the Glycine Combat Sub Sport GMT for its solid build, slim wearability, and value, with many noting its comfortable fit due to curved lugs and thin case. Reviewers highlight its classic design, unique dial, and legible date window, while some owners report excellent bezel action and accuracy under +1 second per day after regulation. A minor criticism is a slightly off-color lume pip on the chapter ring, and one owner notes sub-par lume and inconsistent power reserve not always reaching 42 hours. On balance, owners and reviewers rate the Glycine Combat Sub Sport GMT highly for its comfortable wearability and value at the price point.

Tudor Black Bay 58 GMT

The Tudor Black Bay 58 GMT is widely praised for its functional, proportional, and ergonomic design, wearing identically to the standard Black Bay 58 and feeling substantial without being oversized. Owners are very happy with the 39mm case proportions, noting an improved 12.8mm height. The gilt dial aesthetics and gilt-effect accents are a point of praise for some, while others find them divisive. The Tudor Black Bay 58 GMT features the METAS-certified MT5450-U movement, which is anti-magnetic to 15,000 Gauss and offers a 65-hour power reserve. On balance, owners and reviewers rate the Tudor Black Bay 58 GMT highly for its improved case proportions and gilt dial aesthetics.

From video reviewers

The comfortable 39mm case size is a significant strength. The value at its price point is also a shared positive. Reviewers did not reach a consensus on any weaknesses.

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