Which is cheaper, the Helgray Poseidon Diver (Automatic) or the Seiko Baby Alpinist?

At MSRP the Helgray Poseidon Diver (Automatic) is the cheaper of the two at $249, against $725 for the Seiko Baby Alpinist — a $476 gap before any retailer discounting.

Which is bigger, the Helgray Poseidon Diver (Automatic) or the Seiko Baby Alpinist?

The Helgray Poseidon Diver (Automatic) wears larger at 40mm versus 38mm for the Seiko Baby Alpinist — a 2mm difference across the dial.

Which has better water resistance, the Helgray Poseidon Diver (Automatic) or the Seiko Baby Alpinist?

The Helgray Poseidon Diver (Automatic) is rated to 300m versus 20m for the Seiko Baby Alpinist.

Which has a longer power reserve, the Helgray Poseidon Diver (Automatic) or the Seiko Baby Alpinist?

The Seiko Baby Alpinist carries a 70-hour power reserve against 40 hours on the Helgray Poseidon Diver (Automatic).

What movement does the Helgray Poseidon Diver (Automatic) run compared to the Seiko Baby Alpinist?

Both watches run automatic movements — the Helgray Poseidon Diver (Automatic) uses the NH35 Warranty and the Seiko Baby Alpinist uses the 6R35.

Side by side

Helgray Poseidon Diver (Automatic)vsSeiko Baby Alpinist

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

Helgray Poseidon Diver (Automatic)

poseidon-diver-automatic

MSRP $249

Seiko Baby Alpinist

spb155j1

MSRP $725

At a glance

11 of 29 specs differ

Diameter

Poseidon Diver (Automatic)40mm

Baby Alpinist38mm

Power Reserve

Poseidon Diver (Automatic)40h

Baby Alpinist70h

Water Resistance

Poseidon Diver (Automatic)300m

Baby Alpinist200m

MSRP

Poseidon Diver (Automatic)$249

Baby Alpinist$725

Full specifications

Case

4 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

NH35 Warranty

6R35

Power Reserve

40h

70h

Jewels

Pricing

1 specs

MSRP

$249

$725

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