Side by side

Seiko Diamond CollectionvsTimefactors Speedbird GMT

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

What people say

Owners + reviewers, side by side

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

Seiko Diamond Collection

Owners widely praise the Seiko Diamond Collection for its stunning beauty, particularly highlighting the 14 diamonds and the captivating mother-of-pearl dial, which reviewers note is difficult to photograph accurately. The watch is frequently cited as offering excellent value for its fit and finish, with specific features like sapphire crystal and 100m water resistance contributing to its appeal. One owner reports great durability and accuracy, with a solar charging reserve, though notes that the gold plating on the bracelet shows some fading from desk work. Overall, owners rate the Seiko Diamond Collection highly for its dazzling aesthetics and perceived value.

Timefactors Speedbird GMT

Owners widely praise the Timefactors Speedbird GMT for its quality and value, with many appreciating its 36mm case size for wearability and its surprisingly good bracelet. Some owners note the GMT function is on an inner ring, and one owner found the date wheel sunken. The watch is noted for its classic aesthetic and is considered a good value, though purchasing requires patience due to limited order windows. Overall, owners rate the Timefactors Speedbird GMT highly for its wearability and value at the price point.

At a glance

11 of 29 specs differ
Diameter
Diamond Collection27mm
Speedbird GMT36mm
Power Reserve
Diamond Collection40h
Speedbird GMT
Water Resistance
Diamond Collection50m
Speedbird GMT100m
MSRP
Diamond Collection$475
Speedbird GMT$315

Full specifications

Case

6 specs
Category
Dress
Diameter
27mm
36mm
Thickness
7.5mm
11.6mm
Lug-to-Lug
46mm
42.5mm
Lug Width
6mm
18mm
Water Resistance
50m
100m

Crystal & Dial

2 specs
Crystal
Hardlex
Sapphire
Lume
LumiBrite on hands and index(es)
Super Luminova X1 C3

Movement

2 specs
Caliber
V137
Ronda 515
Power Reserve
40h

Pricing

1 specs
MSRP
$475
$315
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