Side by side
Islander Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301vsGrand Seiko SBGA427
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
18 of 29 specs differDiameter
Islander Automatic Turtle Dive Watch with Blue Dial #ISL-30145mm
SBGA42739mm
Power Reserve
Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301—
SBGA42772h
Water Resistance
Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301200m
SBGA427100m
MSRP
Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301$399
SBGA427$5,800
Full specifications
Case
8 specsCategory
Diver
Dress
Diameter
45mm
39mm
Thickness
15mm
12.3mm
Lug-to-Lug
47mm
46.8mm
Lug Width
22mm
19mm
Finish
—
Brushed and polished
Water Resistance
200m
100m
Caseback
Embossed screw-in caseback
Solid
Crystal & Dial
4 specsCrystal Shape
Double Domed
Flat
AR Coating
Underside
Yes
Dial Color
—
Black
Indices
—
Applied
Movement
5 specsCaliber
Seiko NH36
9R65
Type
Automatic
Spring Drive
Beat Rate
0 vph
28,800 vph
Power Reserve
0h
72h
Jewels
0
25
Pricing
1 specsMSRP
$399
$5,800
More watches worth a look
Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.
Follow this matchup
Get a note when Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301 vs Grand Seiko SBGA427 gets more votes, a community discussion, or a price drop. No account needed.
People also compared
Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.
Islander Luminous Wave Dial Automatic Dive Watch with AR Double-Dome Sapphire Crystal, and Luminous Ceramic Bezel Insert #ISL-62vsGrand Seiko SBGA427Spinnaker Brutus YellowvsGrand Seiko SBGA427Spinnaker PopeyevsGrand Seiko SBGA427Islander Automatic Dive Watch with Bracelet, Double-Domed AR Sapphire Crystal, and Embossed Ceramic Bezel Insert #ISL-18vsGrand Seiko SBGA427Islander Automatic Turtle Dive Watch with Blue Dial #ISL-301vsCincinnati Watch Company The Cincinnatian - Sold Out. Discontinued. LegacyIslander Automatic Turtle Dive Watch with Blue Dial #ISL-301vsYema Wristmaster Slim Small Seconds CMM.29