Side by side

Borealis Watch Co. Estoril 300 GMTvsSeestern S443 Column Wheel Chronograph

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
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.

Seestern S443 Column Wheel Chronograph

Owners widely praise the Seestern S443 Column Wheel Chronograph for its affordable mechanical chronograph movement with a column wheel, derived from the Venus 175. Some owners appreciate the watch's overall aesthetic, with one noting a preference for the black-yellow variant. The ST19 movement's execution is generally well-regarded, though one owner found the chronograph minute counter could stick, a common issue that may require a watchmaker, while another noted sticky chrono pushers after patina development on the bronze case. The ST19 movement lacks an hours totalizer, and its assembly is not as refined as luxury timepieces, though comparable to entry-level automatics. One owner finds the "hand winding" script font on the dial to be a design flaw. Overall, owners rate the Seestern S443 Column Wheel Chronograph highly for its value as a column wheel chronograph, despite minor assembly and functional quirks.

At a glance

17 of 29 specs differ
Diameter
Estoril 300 GMT41.50mm
S443 Column Wheel Chronograph40mm
Power Reserve
Estoril 300 GMT40h
S443 Column Wheel Chronograph45hh
Water Resistance
Estoril 300 GMT300m
S443 Column Wheel Chronograph50m
MSRP
Estoril 300 GMT$600
S443 Column Wheel Chronograph$10

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
41.50mm
40mm
Thickness
13.5mm
13mm
Lug-to-Lug
47mm
48.6mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
50m

Crystal & Dial

3 specs
Dial Color
Black
Pink
Indices
Applied
3D
Lume
BGW9
Super BGW9

Movement

6 specs
Caliber
Miyota 9075
Seagull ST1901
Type
Automatic
Manual
Beat Rate
28,800 vph
3 vph
Power Reserve
40h
45hh
Jewels
25
21
Complications
None
Chronograph, Column Wheel

Pricing

1 specs
MSRP
$600
$10
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