Side by side

Longines PrimaLunavsZelos Helmsman 3

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

PrimaLuna
LonginesPrimaLuna
MSRP $2,950
Helmsman 3
ZelosHelmsman 3
MSRP $529

At a glance

23 of 29 specs differ
Diameter
PrimaLuna34mm
Helmsman 340mm
Power Reserve
PrimaLuna72h
Helmsman 340h
Water Resistance
PrimaLuna30m
Helmsman 3200m
MSRP
PrimaLuna$2,950
Helmsman 3$529

Full specifications

Case

9 specs
Category
Dress
Diver
Diameter
34mm
40mm
Thickness
11.6mm
11.5mm
Lug-to-Lug
41mm
40mm
Lug Width
8mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
30m
200m
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
SS - Frost
Indices
Diamond indexes
Applied
Lume
Super-LumiNova
None

Movement

7 specs
Caliber
L899.5
Miyota 9015
Beat Rate
25,200 vph
28,800 vph
Power Reserve
72h
40h
Jewels
0
25
Hacking
No
Yes
Hand-winding
No
Yes
Complications
Hours, minutes, seconds and date, Moon phase display at 6 o'clock
None

Pricing

1 specs
MSRP
$2,950
$529

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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 stylish, understated design and comfortable 26.5mm and 34mm case sizes, with some preferring the quartz for its lower maintenance and others the automatic for its craftsmanship. The automatic movement, an L899.5 or Caliber L899, offers a 72-hour power reserve and exhibits consistent accuracy averaging a loss of 1.3 seconds per day in testing, though it runs 3-4 seconds slower on the wrist. The redesigned collection features a curvier case with contemporary lug integration and is available in steel or bi-metal. On balance, owners and reviewers appreciate the Longines PrimaLuna for its elegant styling and reliable automatic movement, though some find its brand prestige and design less compelling compared to certain luxury alternatives.

Zelos Helmsman 3

Owners widely praise the Zelos Helmsman 3 for its exceptional finishing and polishing on the titanium case, with some noting it feels nicer than previous models. The unique Titanium Crystalline Dial and Damascus Titanium dial are frequently highlighted as aesthetically pleasing and head-turning features, especially considering the price point. The brushed beads of rice bracelet is described as fitting well, and the on-the-fly clasp is considered amazing. Lume is also noted as great, with lumed crowns being a positive observation. However, some owners report the watch can feel top-heavy with sharp edges, making it uncertain as a daily driver for some. The meteorite bezel is seen by one owner as not adding significant value, and the stock strap's keepers and stitching were considered to detract from the watch's appearance.

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