Side by side

Borealis Watch Co. Estoril 300 GMTvsCitizen Promaster Sikorsky

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

Estoril 300 GMT
Borealis Watch Co.Estoril 300 GMT
MSRP $600
Promaster Sikorsky
CitizenPromaster Sikorsky
MSRP $469

At a glance

12 of 29 specs differ
Diameter
Estoril 300 GMT41.50mm
Promaster Sikorsky42.4mm
Power Reserve
Estoril 300 GMT40h
Promaster Sikorsky40h
Water Resistance
Estoril 300 GMT300m
Promaster Sikorsky200m
MSRP
Estoril 300 GMT$600
Promaster Sikorsky$469

Full specifications

Case

6 specs
Category
Diver
Pilot
Diameter
41.50mm
42.4mm
Thickness
13.5mm
12mm
Lug-to-Lug
47mm
46mm
Lug Width
20mm
22mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Mineral
Dial Color
Black
Grey
Lume
BGW9
None

Movement

2 specs
Caliber
Miyota 9075
B877
Type
Automatic
Solar

Pricing

1 specs
MSRP
$600
$469

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Borealis Watch Co. Estoril 300 GMT

Owners widely praise the Borealis Watch Co. Estoril 300 GMT for its excellent value, robust build quality, and crisp dial, with reviewers highlighting its exceptionally bright BGW9 lume and dive-ready ceramic bezel. Some owners appreciate the brushed and polished finishes, though one owner noted a desire for a white-painted second hand. The included NATO strap is considered too thick with a loose weave, and the sapphire bezel insert is seen by some as a minor aesthetic departure from its inspirations. Overall, owners rate the Borealis Watch Co. Estoril 300 GMT highly for its impressive build quality and value.

Citizen Promaster Sikorsky

The Citizen Promaster Sikorsky is a large 46mm watch honoring the S-92 helicopter, featuring a busy dial with red, white, blue, and yellow accents, and helicopter blade-shaped hands. It houses a solar-powered U680 movement with atomic time syncing. On balance, owners find the Citizen Promaster Sikorsky to be a unique, albeit cluttered, limited edition timepiece.

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