Which is cheaper, the Oblvlo FM SL Day-Date Square or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

At MSRP the Oblvlo FM SL Day-Date Square is the cheaper of the two at $158, against $1,350 for the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition — a $1,192 gap before any retailer discounting.

Which is bigger, the Oblvlo FM SL Day-Date Square or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition wears larger at 42.7mm versus 39mm for the Oblvlo FM SL Day-Date Square — a 3.7mm difference across the dial.

Which has better water resistance, the Oblvlo FM SL Day-Date Square or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition 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 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition carries a 70-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 Sea 1970 Heritage Diver's Save the Ocean Special Edition?

Both watches run automatic movements — the Oblvlo FM SL Day-Date Square uses the Miyota 8215 and the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition uses the 6R35.

Side by side

Oblvlo FM SL Day-Date SquarevsSeiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

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 1970 Heritage Diver's Save the Ocean Special Edition

spb301j1

MSRP $1,350

At a glance

13 of 29 specs differ

Diameter

FM SL Day-Date Square39mm

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition42.7mm

Power Reserve

FM SL Day-Date Square42h

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition70h

Water Resistance

FM SL Day-Date Square50m

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition200m

MSRP

FM SL Day-Date Square$158

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition$1,350

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, index(es) and bezel

Movement

3 specs

Caliber

Miyota 8215

6R35

Power Reserve

42h

70h

Jewels

Pricing

1 specs

MSRP

$158

$1,350

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