Side by side

Longines ULTRA-CHRON CLASSICvsZelos Skyraider 2

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

ULTRA-CHRON CLASSIC
LonginesULTRA-CHRON CLASSIC
MSRP $3,900
Skyraider 2
ZelosSkyraider 2
MSRP $2,399

At a glance

22 of 29 specs differ
Diameter
ULTRA-CHRON CLASSIC37mm
Skyraider 242mm
Power Reserve
ULTRA-CHRON CLASSIC52h
Skyraider 240h
Water Resistance
ULTRA-CHRON CLASSIC50m
Skyraider 250m
MSRP
ULTRA-CHRON CLASSIC$3,900
Skyraider 2$2,399

Full specifications

Case

8 specs
Category
Skeleton
Diameter
37mm
42mm
Thickness
10.95mm
10.5mm
Lug-to-Lug
44.6mm
48.5mm
Lug Width
19mm
22mm
Material
Stainless Steel
Mokume Gane
Finish
Brushed and polished
Caseback
Screw-down case back
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Both sides
Inner
Dial Color
Silver
Mokume
Indices
Applied indexes
Applied
Lume
Super-LumiNova
None

Movement

8 specs
Caliber
L836.6
ETA 6498-1 Élaboré
Type
Automatic
Manual
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 and date
None

Pricing

1 specs
MSRP
$3,900
$2,399

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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 CLASSIC

The Longines ULTRA-CHRON CLASSIC is widely praised for its faithful retro design, high-beat 5Hz movement offering greater precision and a smooth seconds hand, and its value proposition as a new 5Hz watch. Reviewers highlight the L836.6 caliber's TimeLab "ultra chronometer" certification for superior accuracy and shock recovery, and owners find the bracelet very comfortable with easy micro-adjust. Some owners note the design appears dated, and one reviewer points out the dial lacks luminescence and water resistance is only 50m. Owners are split on sizing, with some finding the 40mm case wears larger than expected and recommending the 37mm version. Overall, owners and reviewers rate the Longines ULTRA-CHRON CLASSIC highly for its blend of vintage aesthetics, modern high-beat movement performance, and comfortable wearability.

Zelos Skyraider 2

The Zelos Skyraider 2 is praised for its value, particularly offering unique dial materials like meteorite at a fraction of luxury prices, and its bronze case is noted for a warm glow. Reviewers and owners highlight the Flieger-inspired design and the use of a manual-wind ETA 6498 movement, with BGW9 and C3 Super-LumiNova lume. Some owners find the skeletonized variant ideal for style over everyday legibility, while others note the brand's past designs have sometimes been hard to read or bulky. The Zelos Skyraider 2 is available in various materials and dial options, with prices ranging from $699 to $1,399. On balance, owners and reviewers rate the Zelos Skyraider 2 highly for its distinctive materials and design at a competitive price point.

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