Side by side

Bremont ionBirdvsYema Superman Slim CMM.20

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

ionBird
BremontionBird
MSRP $5,800
Superman Slim CMM.20
YemaSuperman Slim CMM.20
MSRP $2,372

At a glance

10 of 29 specs differ
Diameter
ionBird43mm
Superman Slim CMM.2039mm
Power Reserve
ionBird40h
Superman Slim CMM.2040h
Water Resistance
ionBird
Superman Slim CMM.20300m
MSRP
ionBird$5,800
Superman Slim CMM.20$2,372

Full specifications

Case

6 specs
Category
Pilot
Diver
Diameter
43mm
39mm
Thickness
9.95mm
Lug Width
20mm
Material
Titanium
316L Stainless Steel
Water Resistance
300m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Regular length (15cm - 19cm wrist size)
Black

Movement

1 specs
Caliber
Yema CMM.20

Pricing

1 specs
MSRP
$5,800
$2,372

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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.

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.

Yema Superman Slim CMM.20

Owners and reviewers praise the Yema Superman Slim CMM.20 for its appealing retro design, balanced 39mm case, and in-house CMM.20 micro-rotor movement, with some finding the fish scale bracelet attractive. Concerns exist regarding its $2500/€2,490 MSRP, with some owners questioning its value and noting the potential for QC issues or a "jittery" seconds hand attributed to the new movement. The bracelet's articulation and stamped clasp draw criticism, though some owners report it improves with wear. Overall, owners and reviewers appreciate the Yema Superman Slim CMM.20's vintage styling and unique micro-rotor movement, but its value proposition and some finishing details are points of contention.

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