Which is cheaper, the Praesidus 38mm Automatic or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Praesidus 38mm Automatic is the cheaper of the two at $680, against $995 for the Seiko Prospex SPEEDTIMER Mechanical — a $315 gap before any retailer discounting.

Which is bigger, the Praesidus 38mm Automatic or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical wears larger at 39.5mm versus 38mm for the Praesidus 38mm Automatic — a 1.5mm difference across the dial.

Which has better water resistance, the Praesidus 38mm Automatic or the Seiko Prospex SPEEDTIMER Mechanical?

The Praesidus 38mm Automatic is rated to 100m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Praesidus 38mm Automatic or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 40 hours on the Praesidus 38mm Automatic.

What movement does the Praesidus 38mm Automatic run compared to the Seiko Prospex SPEEDTIMER Mechanical?

Both watches run automatic movements — the Praesidus 38mm Automatic uses the Seiko NH35 and the Seiko Prospex SPEEDTIMER Mechanical uses the 6R55.

Side by side

Praesidus 38mm AutomaticvsSeiko Prospex SPEEDTIMER Mechanical

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

Praesidus 38mm Automatic

P-38-HP-GRSG

MSRP $680

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

15 of 29 specs differ

Diameter

38mm Automatic38mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

38mm Automatic40h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

38mm Automatic100m

Prospex SPEEDTIMER Mechanical200m

MSRP

38mm Automatic$680

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

7 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

38mm Automatic

Black

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Seiko NH35

6R55

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$680

$995

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