Side by side

Bremont ionBirdvsYema Navygraf Marine Nationale CMM.10

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

ionBird
BremontionBird
MSRP $5,800
Navygraf Marine Nationale CMM.10
YemaNavygraf Marine Nationale CMM.10
MSRP $1,614

At a glance

11 of 29 specs differ
Diameter
ionBird43mm
Navygraf Marine Nationale CMM.1039mm
Power Reserve
ionBird40h
Navygraf Marine Nationale CMM.1040h
Water Resistance
ionBird
Navygraf Marine Nationale CMM.10100m
MSRP
ionBird$5,800
Navygraf Marine Nationale CMM.10$1,614

Full specifications

Case

7 specs
Category
Pilot
Diver
Diameter
43mm
39mm
Thickness
11mm
Lug-to-Lug
46mm
Lug Width
19mm
Material
Titanium
316L Stainless Steel
Water Resistance
100m

Crystal & Dial

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

Movement

1 specs
Caliber
Yema CMM.10

Pricing

1 specs
MSRP
$5,800
$1,614

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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 Navygraf Marine Nationale CMM.10

The Yema Navygraf Marine Nationale CMM.10 is lauded for its vibrant blue dial and bezel, a slimmer 39mm case at 11mm thick, and its in-house CMM.10 caliber offering a 70-hour power reserve. Reviewers highlight the clean, legible dial, blue sapphire bezel insert, and competitive pricing under $2,000. However, the steel bracelet's clasp is noted by multiple sources as rattly and feeling slightly cheap, with one reviewer finding it difficult to open. Accuracy is reported within a range of +5/-3 seconds per day. Overall, reviewers praise the Yema Navygraf Marine Nationale CMM.10 for its attractive design and value proposition, tempered by minor concerns regarding the bracelet clasp.

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