Side by side

Grand Seiko SLGB005vsLongines MASTER COLLECTION MOONPHASE

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

SLGB005
Grand SeikoSLGB005
MSRP $11,100
MASTER COLLECTION MOONPHASE
LonginesMASTER COLLECTION MOONPHASE
MSRP $3,500

At a glance

20 of 29 specs differ
Diameter
SLGB00537mm
MASTER COLLECTION MOONPHASE34mm
Power Reserve
SLGB00572h
MASTER COLLECTION MOONPHASE
Water Resistance
SLGB005100m
MASTER COLLECTION MOONPHASE30m
MSRP
SLGB005$11,100
MASTER COLLECTION MOONPHASE$3,500

Full specifications

Case

8 specs
Category
Dress
Moonphase
Diameter
37mm
34mm
Thickness
11.4mm
11.2mm
Lug-to-Lug
44.3mm
49.7mm
Lug Width
20mm
21mm
Finish
Brushed and polished
Water Resistance
100m
30m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Yes
Dial Color
Black
Silver
Indices
Applied

Movement

7 specs
Caliber
9RB2
L899.5
Type
Spring Drive
Automatic
Beat Rate
28,800 vph
0 vph
Power Reserve
72h
0h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$11,100
$3,500

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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.

Grand Seiko SLGB005

The Grand Seiko SLGB005 is widely praised for its stunning "Ice Forest" smoked purple dial, inspired by frost-covered trees, and its compact 37mm Ever-Brilliant Steel case. It is powered by the 9RB2 Spring Drive caliber, noted for its exceptional accuracy of ±3 seconds per month or ±20 seconds per year, and offers a 72-hour power reserve. Reviewers consistently highlight the dial's mesmerizing beauty and the case's sculpted design as significant strengths. However, multiple sources express disappointment that the Grand Seiko SLGB005 omits the micro-adjustment clasp found on other models, especially considering its $11,100 price point, though one reviewer found this did not detract from wearability. Overall, reviewers rate the Grand Seiko SLGB005 highly for its visually arresting dial and precise Spring Drive movement, despite the clasp oversight.

From video reviewers

The watch features a ±3 seconds per month accurate Ultra Fine Accuracy Calibre 9RB2 movement. The Ever-Brilliant Steel finish has polishing flaws that detract from the watch's appearance. Reviewers disagree on the movement's accuracy, with one reviewer citing ±3 seconds per month and another ±10 seconds per month.

Longines MASTER COLLECTION MOONPHASE

Owners widely praise the Longines Master Collection Moonphase for its beautiful, legible, and mesmerizing dial, with one owner noting it balances class and complexity. The watch offers old-world charm and a romantic moonphase complication, with the Caliber L899 movement providing a 64-hour power reserve. Some owners find the $3k price point high, suggesting better value exists elsewhere, while others acquired it for around $1700 USD. One owner notes the 40mm size is a perfect fit for a 6.75-inch wrist, though its limited water resistance makes it unsuitable for adventurous wear. On balance, the consensus is that the Longines Master Collection Moonphase is highly regarded for its classic design and attractive moonphase complication at its price point.

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