Side by side

Glycine Airman Worldtimer GMT Dual TimevsSeiko Diamond Collection

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

Diamond Collection
SeikoDiamond Collection
MSRP $525
What people say

Owners + reviewers, side by side

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

Glycine Airman Worldtimer GMT Dual Time

Owners widely praise the Glycine Airman Worldtimer GMT Dual Time for its comfortable 40mm size, attractive aesthetics, blue GMT hand, sapphire crystal with blue AR coating, and locking bezel. Some owners find it a significant improvement over previous Airman models, with one reporting good timekeeping. However, the dual 24-hour and GMT hands are noted by some as making local time setting less intuitive than a purist 24-hour dial. On balance, owners and reviewers appreciate the Glycine Airman Worldtimer GMT Dual Time for its comfortable wearability and classic design elements.

Seiko Diamond Collection

The Seiko Diamond Collection is widely praised by owners for its stunning beauty, featuring 14 diamonds, a mother-of-pearl dial, and a two-tone color scheme. Reviewers note its dial is difficult to capture in photos and that its fit and finish suggest excellent value, especially when purchased on sale. One owner describes the gold plating on the bracelet showing some fading from desk work, and its gold tone may not suit all tastes. Overall, owners rate the Seiko Diamond Collection highly for its striking aesthetics and perceived value.

At a glance

18 of 29 specs differ
Diameter
Airman Worldtimer GMT Dual Time40mm
Diamond Collection30mm
Power Reserve
Airman Worldtimer GMT Dual Time
Diamond Collection40h
Water Resistance
Airman Worldtimer GMT Dual Time100m
Diamond Collection50m
MSRP
Airman Worldtimer GMT Dual Time$995
Diamond Collection$525

Full specifications

Case

8 specs
Category
GMT
Dress
Diameter
40mm
30mm
Thickness
12mm
6.3mm
Lug-to-Lug
36.5mm
Lug Width
20mm
5mm
Finish
Brushed and polished
Water Resistance
100m
50m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Ivory
Black
Indices
Applied

Movement

5 specs
Caliber
RONDA 515.24H
7N01
Beat Rate
28,800 vph
Power Reserve
40h
Jewels
1
25
Complications
GMT, Date, World Time
None

Pricing

1 specs
MSRP
$995
$525
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