Side by side
Borealis Watch Co. Estoril 300 GMTvsIslander Islander Melville GMT with Blue Hammer Dial #ISL-222
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
18 of 29 specs differDiameter
Estoril 300 GMT41.50mm
Islander Melville GMT with Blue Hammer Dial #ISL-22240mm
Power Reserve
Estoril 300 GMT40h
Islander Melville GMT with Blue Hammer Dial #ISL-222—
Water Resistance
Estoril 300 GMT300m
Islander Melville GMT with Blue Hammer Dial #ISL-222100m
MSRP
Estoril 300 GMT$600
Islander Melville GMT with Blue Hammer Dial #ISL-222$369
Full specifications
Case
8 specsCategory
Diver
GMT
Diameter
41.50mm
40mm
Thickness
13.5mm
13mm
Lug-to-Lug
47mm
0mm
Lug Width
20mm
20mm
Finish
Brushed and polished
—
Water Resistance
300m
100m
Caseback
Solid
Screw-down
Crystal & Dial
5 specsCrystal Shape
Flat
Domed
AR Coating
Inner
Underside
Dial Color
Black
—
Indices
Applied
—
Lume
BGW9
None
Movement
4 specsCaliber
Miyota 9075
Seiko NH34
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
0h
Jewels
25
0
Pricing
1 specsMSRP
$600
$369
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