Side by side

Bremont ionBirdvsZelos Spearfish GMT

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

ionBird
BremontionBird
MSRP $5,800
Spearfish GMT
ZelosSpearfish GMT
MSRP $999

At a glance

10 of 29 specs differ
Diameter
ionBird43mm
Spearfish GMT40mm
Power Reserve
ionBird40h
Spearfish GMT40h
Water Resistance
ionBird
Spearfish GMT200m
MSRP
ionBird$5,800
Spearfish GMT$999

Full specifications

Case

7 specs
Category
Pilot
GMT
Diameter
43mm
40mm
Thickness
13mm
Lug-to-Lug
40mm
Lug Width
20mm
Material
Titanium
316L Stainless Steel
Water Resistance
200m

Crystal & Dial

1 specs
Dial Color
Regular length (15cm - 19cm wrist size)
Frost

Movement

1 specs
Caliber
Sellita SW330-2

Pricing

1 specs
MSRP
$5,800
$999

Follow this matchup

Get a note when Bremont ionBird vs Zelos Spearfish GMT 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.

Bremont ionBird

Owners report the Bremont ionBird is overpriced and features a printed dial with a poorly placed date window at 4:30, which some find visually disruptive. However, some owners suggest its case finishing is superior to competitors. The 43mm titanium Bremont ionBird GMT is powered by a COSC-certified BE-93-2AV automatic movement and retails for $5,795. On balance, owners and reviewers find the Bremont ionBird's date window placement and price point to be significant drawbacks.

Zelos Spearfish GMT

The Zelos Spearfish GMT is widely praised for its exceptional value, with reviewers highlighting its superb finishing, flawless machining, and a tool-less micro-adjustment clasp that exceeds its price point. It features a La Joux-Perret G100 movement with a 68-hour power reserve, achieving an average accuracy of +2.6 seconds per day, or a Miyota 9075 movement offering flier-style GMT functionality. The 40mm case and bidirectional 48-click ceramic bezel are well-executed, though one reviewer noted a minor compromise in the end link fit. Overall, owners and reviewers rate the Zelos Spearfish GMT highly for its impressive finishing and value proposition.

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.