Side by side

Biatec T. G. MasarykvsSeiko Prospex Sea The Black Series

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

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T. G. Masaryk
BiatecT. G. Masaryk
MSRP $2,214
See the full T. G. Masaryk
Prospex Sea The Black Series
SeikoProspex Sea The Black Series
MSRP $765
See the full Prospex Sea The Black Series
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At a glance

13 of 29 specs differ
Diameter
T. G. Masaryk40mm
Prospex Sea The Black Series45mm
Power Reserve
T. G. Masaryk41h
Prospex Sea The Black Series41h
Water Resistance
T. G. Masaryk100m
Prospex Sea The Black Series200m
MSRP
T. G. Masaryk$2,214
Prospex Sea The Black Series$765

Full specifications

Case

7 specs
Category
—
Diver
Diameter
40mm
45mm
Thickness
11.15mm
13.2mm
Lug-to-Lug
48mm
47.7mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

3 specs
AR Coating
—
Anti-reflective coating on inner surface
Dial Color
Beige
—
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

2 specs
Caliber
Sellita SW200-1
Seiko 4R36
Jewels
0
24

Pricing

1 specs
MSRP
$2,214
$765
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