Which is cheaper, the Praesidus C-47 D-day - Aluminum Patina or the Formex Reef 42 mm?

At MSRP the Praesidus C-47 D-day - Aluminum Patina is the cheaper of the two at $550, against $2,414 for the Formex Reef 42 mm — a $1,864 gap before any retailer discounting.

Which is bigger, the Praesidus C-47 D-day - Aluminum Patina or the Formex Reef 42 mm?

The Formex Reef 42 mm wears larger at 42mm versus 38mm for the Praesidus C-47 D-day - Aluminum Patina — a 4mm difference across the dial.

Which has better water resistance, the Praesidus C-47 D-day - Aluminum Patina or the Formex Reef 42 mm?

The Formex Reef 42 mm is rated to 300m versus 100m for the Praesidus C-47 D-day - Aluminum Patina.

Which has a longer power reserve, the Praesidus C-47 D-day - Aluminum Patina or the Formex Reef 42 mm?

The Formex Reef 42 mm carries a 56-hour power reserve against 40 hours on the Praesidus C-47 D-day - Aluminum Patina.

What movement does the Praesidus C-47 D-day - Aluminum Patina run compared to the Formex Reef 42 mm?

Both watches run automatic movements — the Praesidus C-47 D-day - Aluminum Patina uses the Seiko NH35 and the Formex Reef 42 mm uses the Sellita SW300-1.

Side by side

Praesidus C-47 D-day - Aluminum PatinavsFormex Reef 42 mm

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

Praesidus C-47 D-day - Aluminum Patina

c-47-a-11-skytrain-aluminum-patina

MSRP $550

Formex Reef 42 mm

reef-42mm-automatic-cosc-300m-black

MSRP $2,414

At a glance

12 of 29 specs differ

Diameter

C-47 D-day - Aluminum Patina38mm

Reef 42 mm42mm

Power Reserve

C-47 D-day - Aluminum Patina40h

Reef 42 mm56h

Water Resistance

C-47 D-day - Aluminum Patina100m

Reef 42 mm300m

MSRP

C-47 D-day - Aluminum Patina$550

Reef 42 mm$2,414

Full specifications

Case

7 specs

Crystal & Dial

2 specs

Dial Color

C-47 D-Day - Aluminum Patina

Black

Lume

None

Super-LumiNova

Movement

2 specs

Caliber

Seiko NH35

Sellita SW300-1

Power Reserve

40h

56h

Pricing

1 specs

MSRP

$550

$2,414

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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.

Praesidus C-47 D-day - Aluminum Patina

The Praesidus C-47 D-day - Aluminum Patina is praised for its 38mm diameter and its dial, crafted from actual C-47 airplane doors, offering a unique patina and historical context. Reviewers note its utilitarian, vintage military aesthetic, enhanced by a sandblasted stainless steel case and acrylic crystal. The watch is equipped with a Miyota 9039 movement, 100m water resistance, and Super-LumiNova for visibility. Accuracy is rated at -10/+30 seconds per day, with a 42-hour power reserve. On balance, reviewers highlight the Praesidus C-47 D-day - Aluminum Patina's historical dial as its most compelling feature, transforming a potentially divisive material into a unique selling point.

The Formex Reef 42 mm is widely praised for its comfortable bracelet featuring a micro-adjust clasp, COSC-certified Sellita movement, and excellent build quality. Owners appreciate the gradient dial's visual appeal and the overall wearability. Some owners note the seconds hand does not perfectly align with markers, and one owner found the lugs' taper hinders third-party strap fit. The bracelet's length and sporty design are noted as limiting versatility by some. On balance, owners and reviewers rate the Formex Reef 42 mm highly for its impressive wearability and value at the price point.

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