Side by side

Massena LAB Dato-RacervsSeestern S446 GMT

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

Dato-Racer
Massena LABDato-Racer
MSRP $1,595
S446 GMT
SeesternS446 GMT
MSRP $299

At a glance

15 of 29 specs differ
Diameter
Dato-Racer40mm
S446 GMT39.5mm
Power Reserve
Dato-Racer38h
S446 GMT41hh
Water Resistance
Dato-Racer50m
S446 GMT100m
MSRP
Dato-Racer$1,595
S446 GMT$299

Full specifications

Case

6 specs
Category
Sport
GMT
Diameter
40mm
39.5mm
Thickness
10.5mm
13mm
Lug-to-Lug
46mm
47mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

3 specs
Crystal Shape
Flat
Domed
AR Coating
Yes
Inner
Dial Color
Black
Cream

Movement

5 specs
Caliber
SW400-1
Seiko NH34A GMT
Beat Rate
28,800 vph
3 vph
Power Reserve
38h
41hh
Jewels
26
24
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$1,595
$299

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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.

Massena LAB Dato-Racer

Owners widely praise the Massena LAB Dato-Racer as an excellent everyday watch, appreciating its blend of 1970s-inspired aesthetics with modern dimensions. This model is a limited edition of 99 pieces. On balance, owners rate the Massena LAB Dato-Racer highly for its successful fusion of vintage design and contemporary wearability.

Seestern S446 GMT

Owners widely praise the Seestern S446 GMT for its stunning finishing and extreme value, with a sapphire crystal and adjustable clasp. The winding action is noted as buttery smooth, and the 39.5mm case size is considered very wearable. Some owners, however, flag the lume as a weak point and one owner found the bracelet clasp lacked sufficient micro-adjustment. The Seestern S446 GMT is considered an extreme value for the dollar. Overall, owners rate the Seestern S446 GMT highly for its exceptional finishing and value proposition at its price point.

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