Which is cheaper, the Oblvlo FM SL Day-Date Square or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Oblvlo FM SL Day-Date Square is the cheaper of the two at $158, against $995 for the Seiko Prospex SPEEDTIMER Mechanical — a $837 gap before any retailer discounting.

Which is bigger, the Oblvlo FM SL Day-Date Square or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical wears larger at 39.5mm versus 39mm for the Oblvlo FM SL Day-Date Square — a 0.5mm difference across the dial.

Which has better water resistance, the Oblvlo FM SL Day-Date Square or the Seiko Prospex SPEEDTIMER Mechanical?

The Oblvlo FM SL Day-Date Square is rated to 50m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Oblvlo FM SL Day-Date Square or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 42 hours on the Oblvlo FM SL Day-Date Square.

What movement does the Oblvlo FM SL Day-Date Square run compared to the Seiko Prospex SPEEDTIMER Mechanical?

Both watches run automatic movements — the Oblvlo FM SL Day-Date Square uses the Miyota 8215 and the Seiko Prospex SPEEDTIMER Mechanical uses the 6R55.

Side by side

Oblvlo FM SL Day-Date SquarevsSeiko Prospex SPEEDTIMER Mechanical

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

Oblvlo FM SL Day-Date Square

FM-SL-DD-D

MSRP $158

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

13 of 29 specs differ

Diameter

FM SL Day-Date Square39mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

FM SL Day-Date Square42h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

FM SL Day-Date Square50m

Prospex SPEEDTIMER Mechanical200m

MSRP

FM SL Day-Date Square$158

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

6 specs

Crystal & Dial

3 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Miyota 8215

6R55

Power Reserve

42h

72h

Jewels

Pricing

1 specs

MSRP

$158

$995

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