Side by side

Longines ULTRA‑CHRON CARBONvsYema Navygraf CMM.10

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

ULTRA‑CHRON CARBON
LonginesULTRA‑CHRON CARBON
MSRP $5,550
Navygraf CMM.10
YemaNavygraf CMM.10
MSRP $1,899

At a glance

22 of 29 specs differ
Diameter
ULTRA‑CHRON CARBON43mm
Navygraf CMM.1039mm
Power Reserve
ULTRA‑CHRON CARBON52h
Navygraf CMM.1040h
Water Resistance
ULTRA‑CHRON CARBON300m
Navygraf CMM.10100m
MSRP
ULTRA‑CHRON CARBON$5,550
Navygraf CMM.10$1,899

Full specifications

Case

8 specs
Diameter
43mm
39mm
Thickness
14mm
11mm
Lug-to-Lug
48.9mm
46mm
Lug Width
22mm
19mm
Material
Titanium
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
300m
100m
Caseback
Screw-down case back
Solid

Crystal & Dial

6 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Flat
AR Coating
Both sides
Inner
Dial Color
Silver
Standard
Indices
Applied indexes
Applied
Lume
Super-LumiNova
None

Movement

7 specs
Caliber
L836.6
Yema CMM.10
Beat Rate
36,000 vph
28,800 vph
Power Reserve
52h
40h
Jewels
0
25
Hacking
No
Yes
Hand-winding
No
Yes
Complications
Hours, minutes, seconds
None

Pricing

1 specs
MSRP
$5,550
$1,899

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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.

Longines ULTRA‑CHRON CARBON

The Longines ULTRA‑CHRON CARBON is praised for its lightweight composite case and unique "Batman" aesthetic, with its 5Hz movement widely noted for exceptional accuracy. Owners widely report the high-beat movement is the cheapest 5Hz option available. Some owners find the non-rotating bezel a relief, while others consider it a deal-breaker, noting the watch is no longer a dive watch. On balance, owners and reviewers highly rate the Longines ULTRA‑CHRON CARBON for its cool, lightweight design and the exceptional accuracy of its 5Hz movement.

Yema Navygraf CMM.10

Owners widely report quality control concerns and suspect craftsmanship with the Yema Navygraf, with one user noting crooked text. A reviewer praised the Slim CMM.20 Limited Edition for its stylish, slim profile and classy finishing on a black lacquered enamel dial, though the audible micro-rotor spinning at its price point was a surprise. On balance, the consensus is that while the Yema Navygraf offers a stylish design, potential buyers should be aware of reported quality control issues.

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