Which is cheaper, the Biatec T. G. Masaryk or the Seiko Prospex Sea?

At MSRP the Seiko Prospex Sea is the cheaper of the two at $900, against $2,214 for the Biatec T. G. Masaryk — a $1,314 gap before any retailer discounting.

Which is bigger, the Biatec T. G. Masaryk or the Seiko Prospex Sea?

The Seiko Prospex Sea wears larger at 41mm versus 40mm for the Biatec T. G. Masaryk — a 1mm difference across the dial.

Which has better water resistance, the Biatec T. G. Masaryk or the Seiko Prospex Sea?

The Seiko Prospex Sea is rated to 200m versus 100m for the Biatec T. G. Masaryk.

Which has a longer power reserve, the Biatec T. G. Masaryk or the Seiko Prospex Sea?

The Seiko Prospex Sea carries a 70-hour power reserve against 41 hours on the Biatec T. G. Masaryk.

What movement does the Biatec T. G. Masaryk run compared to the Seiko Prospex Sea?

Both watches run automatic movements — the Biatec T. G. Masaryk uses the Sellita SW200-1 and the Seiko Prospex Sea uses the 6R35.

Side by side

Biatec T. G. MasarykvsSeiko Prospex Sea

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

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Biatec T. G. Masaryk

MSRP $2,214

Seiko Prospex Sea

spb317j1

MSRP $900

At a glance

14 of 29 specs differ

Diameter

T. G. Masaryk40mm

Prospex Sea41mm

Power Reserve

T. G. Masaryk41h

Prospex Sea70h

Water Resistance

T. G. Masaryk100m

Prospex Sea200m

MSRP

T. G. Masaryk$2,214

Prospex Sea$900

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Beige

Black

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Sellita SW200-1

6R35

Power Reserve

41h

70h

Jewels

Pricing

1 specs

MSRP

—

$900

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Biatec T. G. MasarykvsSeiko Prospex Sea

At a glance

Full specifications

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