Brillier Mono Mechanical Blue Dial Automatic with Moon Phase and Big DatevsGrand Seiko SBGR321

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Brillier Mono Mechanical Blue Dial Automatic with Moon Phase and Big Date at true scale

Mono Mechanical Blue Dial Automatic with Moon Phase and Big Date

Grand Seiko SBGR321 at true scale

SBGR321

Diameter

43mm

40mm

Lug-to-Lug

n/a

46.6mm

Thickness

14mm

13mm

lowest

Water Resistance

n/a

100m

Power Reserve

n/a

72h

MSRP

$795

lowest

$5,200

Movement

Automatic

Grand Seiko 9S65

Case

5 specs
Diameter
43mm
40mm
Thickness
14mm
13mm
Lug-to-Lug
n/a
46.6mm
Lug Width
22mm
20mm
Water Resistance
n/a
100m

Crystal & Dial

1 specs
AR Coating
n/a
Yes

Movement

2 specs
Caliber
n/a
Grand Seiko 9S65
Power Reserve
0h
72h

Pricing

1 specs
MSRP
$795
$5,200
Keep your wishlist and collection together in the appExplore the app

Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Brillier Mono Mechanical Blue Dial Automatic with Moon Phase and Big Date

Owners praise the Brillier Mono Mechanical Blue Dial Automatic Watch with Moon Phase and Big Date for its clean, symmetrical blue dial with legible indices and a navy blue pointer date. One owner found it a good value for a Swiss-made automatic moonphase around $600 on the gray market. However, one owner reported the metal bracelet and included leather strap felt cheap and of poor quality, noting the absence of adjustment tools and a manual. On balance, owners rate the Brillier Mono Mechanical Blue Dial Automatic Watch with Moon Phase and Big Date highly for its attractive dial and value proposition as a Swiss-made automatic moonphase.

Grand Seiko SBGR321

Owners and reviewers widely praise the Grand Seiko SBGR321 for its attractive design, compelling 40mm dimensions, and exceptional finishing, particularly the sharp lines and contrasting brushing and polishing on the steel case. The sunburst blue dial, inspired by the dawn sky, is a consistent highlight, featuring applied markers and hands that showcase Grand Seiko's signature craftsmanship. The robust 9S65 automatic movement is reported to run within specifications, with one source noting a precision rate of +5 to -3 seconds per day and a 3-day power reserve. The watch also features a display caseback revealing a blue rotor with a crimson rim, inspired by Mount Iwate. On balance, owners and reviewers rate the Grand Seiko SBGR321 highly for its exquisite finishing and compelling blue dial at the price point.