Side by side

Longines PRIMALUNAvsZelos Hammerhead V3 300m Titanium

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

PRIMALUNA
LonginesPRIMALUNA
MSRP $1,950
Hammerhead V3 300m Titanium
ZelosHammerhead V3 300m Titanium
MSRP $559

At a glance

23 of 29 specs differ
Diameter
PRIMALUNA30mm
Hammerhead V3 300m Titanium44mm
Power Reserve
PRIMALUNA40h
Hammerhead V3 300m Titanium40h
Water Resistance
PRIMALUNA30m
Hammerhead V3 300m Titanium300m
MSRP
PRIMALUNA$1,950
Hammerhead V3 300m Titanium$559

Full specifications

Case

9 specs
Category
Dress
Diver
Diameter
30mm
44mm
Thickness
8.3mm
13mm
Lug-to-Lug
37mm
44mm
Lug Width
7mm
22mm
Material
Stainless Steel
Titanium
Finish
Brushed and polished
Water Resistance
30m
300m
Caseback
Transparent case back with sapphire crystal
Solid

Crystal & Dial

6 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Flat
AR Coating
Both sides
Inner
Dial Color
Blue
Ti - Mosaic MOP
Indices
Diamond indexes
Applied
Lume
Super-LumiNova
None

Movement

7 specs
Caliber
L257.2
Seiko NH35
Type
Quartz
Automatic
Beat Rate
25,200 vph
28,800 vph
Jewels
0
25
Hacking
No
Yes
Hand-winding
No
Yes
Complications
Hours, minutes, seconds and date
None

Pricing

1 specs
MSRP
$1,950
$559

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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 PRIMALUNA

Owners widely praise the Longines PRIMALUNA for its attractive style and understated 26.5mm size, with some preferring the automatic for its craftsmanship and heirloom quality. The redesigned 34mm model features an automatic movement, date complication, and polished case design, available in steel or bi-metal with various dial and strap options. Accuracy averages a loss of 1.3 seconds per day across six positions, running 3-4 seconds slower on the wrist, which is within COSC standards. Prices range from EUR 2,850 to EUR 6,600. Overall, owners rate the Longines PRIMALUNA highly for its appealing design and reliable automatic movement.

Zelos Hammerhead V3 300m Titanium

The Zelos Hammerhead V3 300m Titanium is widely praised for its exceptional lume, unique and beautiful dial finishing that reflects light dramatically, and solid build quality that exceeds its price point. Owners also highlight its comfortable wearability, especially the lightweight titanium variant, and the convenient on-the-fly micro-adjustment on the bracelet. One owner notes the Japanese movement performs better than anticipated, and the Ti-Damascus variant features a unique, patterned dial and bezel. However, some owners find the 44mm size large, the crown "off," and the bracelet clasp could be more scratch-resistant, with resizing pins described as stubborn. Reattaching the bracelet after removal is also noted as extremely difficult. Overall, owners rate the Zelos Hammerhead V3 300m Titanium highly for its impressive dial aesthetics and value for money.

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