Side by side

Borealis Watch Co. NeptunovsGrand Seiko SLGA015

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

Neptuno
Borealis Watch Co.Neptuno
MSRP $390
SLGA015
Grand SeikoSLGA015
MSRP $12,600

At a glance

12 of 29 specs differ
Diameter
Neptuno40.00mm
SLGA01543.8mm
Power Reserve
Neptuno40h
SLGA015120h
Water Resistance
Neptuno300m
SLGA015200m
MSRP
Neptuno$390
SLGA015$12,600

Full specifications

Case

6 specs
Diameter
40.00mm
43.8mm
Thickness
14.10mm
13.8mm
Lug-to-Lug
47.20mm
51.5mm
Lug Width
20mm
23mm
Material
Stainless Steel
Titanium
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Lume
BGW9
None

Movement

3 specs
Caliber
NH38
9RA5
Type
Automatic
Spring Drive
Power Reserve
40h
120h

Pricing

1 specs
MSRP
$390
$12,600

Follow this matchup

Get a note when Borealis Watch Co. Neptuno vs Grand Seiko SLGA015 gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Christopher Ward C60 Lympstone
Christopher Wardmicro

C60 Lympstone

6 watches · 9 variantsC60
40mm·Automatic·600m WR
$1,615MSRP
—Used
RZE Aspirare
RZEmicro

Aspirare

Ref. RZE-ASP
44mm·Automatic·200m WR
$699MSRP
—Used
Borealis Watch Co. Sea Storm MK2
Borealis Watch Co.micro

Sea Storm MK2

Ref. borealis-sea-storm-mk2-random-rob-special-limited-edition
41.50mm·Automatic·300m WR
$475MSRP
—Used
Spinnaker Tesei Titanium
Spinnakermicro

Tesei Titanium

4 watches · 10 variantsTesei
42mm·Automatic·200m WR
$625MSRP
—Used
Boldr Marine
Boldrmicro

Marine

2 variantsRef. marine-elewana
40mm·Automatic·200m WR
$439MSRP
—Used
Zelos Great White 43
Zelosmicro

Great White 43

3 variantsGreat White
43mm·Automatic·300m WR
$599MSRP
—Used
Boldr Charizard
Boldrmicro
Pokémon Collab

Charizard

Ref. charizard
40mm·Automatic·200m WR
$449MSRP
—Used
Zelos Hammerhead V3 300m Titanium
Zelosmicro

Hammerhead V3 300m Titanium

2 watches · 16 variantsHammerhead V3
44mm·Automatic·300m WR
$559MSRP
—Used
All alternatives to the Neptuno →All alternatives to the SLGA015 →
Explore the full catalog
Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Christopher Ward C60 LympstonevsGrand Seiko SLGA015Borealis Watch Co. Sea Storm MK2vsGrand Seiko SLGA015Boldr MarinevsGrand Seiko SLGA015Boldr CharizardvsGrand Seiko SLGA015Borealis Watch Co. NeptunovsRZE AspirareBorealis Watch Co. NeptunovsSpinnaker Tesei Titanium
Edit this comparisonAdd another watchMore diver comparisonsBest Diver Watches Under $500