Grandeur Watches Luxury Series G15118vsLongines PrimaLuna
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Luxury Series G15118

PrimaLuna
Diameter
35mm
34mm
Lug-to-Lug
n/a
41mm
Thickness
10mm
lowest
11.6mm
Water Resistance
n/a
30m
Power Reserve
n/a
72h
MSRP
$266
lowest
$3,400
Movement
Quartz
Longines L899.5
Case
7 specsCrystal & Dial
5 specsMovement
5 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Grandeur Watches Luxury Series G15118 as a well-built, properly sized dress watch and a conversation starter, with one owner finding its design extremely good. The polished finish is noted as difficult to maintain. Overall, owners rate the Grandeur Watches Luxury Series G15118 highly for its design and build quality at its price point.
The Longines PrimaLuna is praised for its stylish, polished case design and fluid aesthetics, with reviewers noting its curvier, more contemporary lug integration. Owners appreciate the automatic movement, specifically the L899.5 caliber, which offers a 72-hour power reserve. Accuracy is reported to average a loss of 1.3 seconds per day in six positions, though it can run 3-4 seconds slower on the wrist, a performance considered within COSC standards. Some owners prefer the automatic for its perceived craftsmanship, while others find the quartz models more appealing due to their lower price and reduced maintenance. The Longines PrimaLuna is seen as less desirable than certain luxury alternatives, with brand prestige cited as a significant factor. Overall, owners and reviewers appreciate the Longines PrimaLuna for its elegant design and automatic movement's capabilities, though its brand prestige is a point of comparison against higher-end competitors.
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