Side by side

Seestern Sub 300 V4vsFormex Reef 39.5 mm

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

Sub 300 V4
SeesternSub 300 V4
MSRP $10
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

17 of 29 specs differ
Diameter
Sub 300 V442mm
Reef 39.5 mm39.5mm
Power Reserve
Sub 300 V441h
Reef 39.5 mm56h
Water Resistance
Sub 300 V4200m
Reef 39.5 mm300m
MSRP
Sub 300 V4$10
Reef 39.5 mm$2,230

Full specifications

Case

8 specs
Diameter
42mm
39.5mm
Thickness
13mm
11mm
Lug-to-Lug
46mm
45.5mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Sandblasted
Brushed and polished
Water Resistance
200m
300m
Caseback
Solid screw-down
Solid

Crystal & Dial

3 specs
AR Coating
Underside
Inner
Dial Color
Orange
Bahama Blue
Lume
Japan Lume (blue glow)
Super-LumiNova

Movement

5 specs
Caliber
Seiko NH35A
Sellita SW300-1
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
56h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$10
$2,230

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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.

Seestern Sub 300 V4

Owners widely praise the Seestern Sub 300 V4 for its terrific fit and finish and surprising little touches at its $179 price, noting top-notch case, dial, bezel, and crystal. The bracelet is considered nice enough for the price point, and the watch is powered by the solid and reliable Seiko NH35 movement. Some owners report that the polished sides of the case show signs of wear. Overall, owners rate the Seestern Sub 300 V4 highly for its excellent case, dial, and bezel finishing at the price.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

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