Side by side

Timefactors Speedbird GMTvsUnimatic Modello Uno UT1-BSTN Collab Diver

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

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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.

Timefactors Speedbird GMT

Owners widely praise the Timefactors Speedbird GMT for its quality and value, with many appreciating its 36mm case size for wearability and its surprisingly good bracelet. Some owners note the GMT function is on an inner ring, and one owner found the date wheel sunken. The watch is noted for its classic aesthetic and is considered a good value, though purchasing requires patience due to limited order windows. Overall, owners rate the Timefactors Speedbird GMT highly for its wearability and value at the price point.

Unimatic Modello Uno UT1-BSTN Collab Diver

The Unimatic Modello Uno UT1-BSTN Collab Diver is widely praised for its robust, tool-watch design and utilitarian features, including MIL-STD-810H shock resistance and individually pressure-tested cases. Reviewers highlight the sandblasted 41.5mm steel case with its masculine, monolithic feel and bold lugs, as well as the legible dial. The Seiko VH31 mecaquartz movement provides quartz accuracy with a sweeping seconds hand, and the watch boasts 300m water resistance. One reviewer notes a lack of contrast between the luminous indexes and the dial, and another points out the crystal's lack of AR-coating as a hint at its price point. Overall, reviewers rate the Unimatic Modello Uno UT1-BSTN Collab Diver highly for its rugged build and practical, entry-level tool watch appeal.

At a glance

11 of 29 specs differ
Diameter
Speedbird GMT36mm
Modello Uno UT1-BSTN Collab Diver41.5mm
Power Reserve
Speedbird GMT
Modello Uno UT1-BSTN Collab Diver
Water Resistance
Speedbird GMT100m
Modello Uno UT1-BSTN Collab Diver300m
MSRP
Speedbird GMT$315
Modello Uno UT1-BSTN Collab Diver$680

Full specifications

Case

6 specs
Diameter
36mm
41.5mm
Thickness
11.6mm
0mm
Lug-to-Lug
42.5mm
0mm
Lug Width
18mm
0mm
Material
Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

2 specs
Crystal
Sapphire
Lume
Super Luminova X1 C3
None

Movement

2 specs
Caliber
Ronda 515
Seiko VH31
Power Reserve
0h

Pricing

1 specs
MSRP
$315
$680
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