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

At MSRP the Oblvlo FM SL Day-Date Square is the cheaper of the two at $158, against $595 for the Seiko Prospex Sea — a $437 gap before any retailer discounting.

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

The Seiko Prospex Sea wears larger at 41.7mm versus 39mm for the Oblvlo FM SL Day-Date Square — a 2.7mm difference across the dial.

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

The Seiko Prospex Sea is rated to 200m versus 50m for the Oblvlo FM SL Day-Date Square.

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

The Oblvlo FM SL Day-Date Square carries a 42-hour power reserve against 41 hours on the Seiko Prospex Sea.

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

Both watches run automatic movements — the Oblvlo FM SL Day-Date Square uses the Miyota 8215 and the Seiko Prospex Sea uses the 4R35.

Side by side

Oblvlo FM SL Day-Date SquarevsSeiko Prospex Sea

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 Sea

srpl11

MSRP $595

At a glance

12 of 29 specs differ

Diameter

FM SL Day-Date Square39mm

Prospex Sea41.7mm

Power Reserve

FM SL Day-Date Square42h

Prospex Sea41h

Water Resistance

FM SL Day-Date Square50m

Prospex Sea200m

MSRP

FM SL Day-Date Square$158

Prospex Sea$595

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Crystal

Sapphire

Hardlex

Lume

None

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Miyota 8215

4R35

Power Reserve

42h

41h

Jewels

Pricing

1 specs

MSRP

$158

$595

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Oblvlo FM SL Day-Date SquarevsSeiko Prospex Sea

At a glance

Full specifications

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