Side by side

Citizen Promaster Diver AutomaticvsFormex Reef 39.5 mm

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

Promaster Diver Automatic
CitizenPromaster Diver Automatic
MSRP $469
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

10 of 29 specs differ
Diameter
Promaster Diver Automatic44mm
Reef 39.5 mm39.5mm
Power Reserve
Promaster Diver Automatic40h
Reef 39.5 mm56h
Water Resistance
Promaster Diver Automatic200m
Reef 39.5 mm300m
MSRP
Promaster Diver Automatic$469
Reef 39.5 mm$2,230

Full specifications

Case

5 specs
Diameter
44mm
39.5mm
Thickness
12mm
11mm
Lug-to-Lug
46mm
45.5mm
Lug Width
20mm
22mm
Water Resistance
200m
300m

Crystal & Dial

2 specs
Dial Color
Blue
Bahama Blue
Lume
None
Super-LumiNova

Movement

2 specs
Caliber
8204
Sellita SW300-1
Power Reserve
40h
56h

Pricing

1 specs
MSRP
$469
$2,230

Follow this matchup

Get a note when Citizen Promaster Diver Automatic vs Formex Reef 39.5 mm gets more votes, a community discussion, or a price drop. No account needed.

What people say

Owners + reviewers, side by side

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

Citizen Promaster Diver Automatic

Owners widely praise the Citizen Promaster Diver Automatic for its lightweight titanium build, comfortable wear, and good specifications at its price point, with one owner highlighting its accuracy and dynamic dial made from recycled materials. Some users find the bezel action spongy and the bracelet subpar, while others note the overall finish is basic due to the brushed titanium. A reviewer also points out a preference for sapphire crystal and ceramic bezel inserts. On balance, owners rate the Citizen Promaster Diver Automatic highly for its value proposition as an affordable, lightweight, and accurate dive watch.

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.

Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.