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

At MSRP the Seiko Prospex SPEEDTIMER Mechanical is the cheaper of the two at $995, against $2,214 for the Biatec T. G. Masaryk — a $1,219 gap before any retailer discounting.

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

The Biatec T. G. Masaryk wears larger at 40mm versus 39.5mm for the Seiko Prospex SPEEDTIMER Mechanical — a 0.5mm difference across the dial.

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

The Biatec T. G. Masaryk is rated to 100m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

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

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-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 SPEEDTIMER Mechanical?

Both watches run automatic movements — the Biatec T. G. Masaryk uses the Sellita SW200-1 and the Seiko Prospex SPEEDTIMER Mechanical uses the 6R55.

Side by side

Biatec T. G. MasarykvsSeiko Prospex SPEEDTIMER Mechanical

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 SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

14 of 29 specs differ

Diameter

T. G. Masaryk40mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

T. G. Masaryk41h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

T. G. Masaryk100m

Prospex SPEEDTIMER Mechanical200m

MSRP

T. G. Masaryk$2,214

Prospex SPEEDTIMER Mechanical$995

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 and index(es)

Movement

3 specs

Caliber

Sellita SW200-1

6R55

Power Reserve

41h

72h

Jewels

Pricing

1 specs

MSRP

—

$995

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Biatec T. G. MasarykvsSeiko Prospex SPEEDTIMER Mechanical

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