Which is cheaper, the Hamilton American Classic Intra-Matic Auto or the Formex Reef 42 mm?

At MSRP the Hamilton American Classic Intra-Matic Auto is the cheaper of the two at $1,275, against $2,414 for the Formex Reef 42 mm — a $1,139 gap before any retailer discounting.

Which is bigger, the Hamilton American Classic Intra-Matic Auto or the Formex Reef 42 mm?

The Formex Reef 42 mm wears larger at 42mm versus 40mm for the Hamilton American Classic Intra-Matic Auto — a 2mm difference across the dial.

Which has better water resistance, the Hamilton American Classic Intra-Matic Auto or the Formex Reef 42 mm?

The Formex Reef 42 mm is rated to 300m versus 50m for the Hamilton American Classic Intra-Matic Auto.

Which has a longer power reserve, the Hamilton American Classic Intra-Matic Auto or the Formex Reef 42 mm?

The Hamilton American Classic Intra-Matic Auto carries a 80-hour power reserve against 56 hours on the Formex Reef 42 mm.

What movement does the Hamilton American Classic Intra-Matic Auto run compared to the Formex Reef 42 mm?

Both watches run automatic movements — the Hamilton American Classic Intra-Matic Auto uses the H-10 and the Formex Reef 42 mm uses the Sellita SW300-1.

Side by side

Hamilton American Classic Intra-Matic AutovsFormex Reef 42 mm

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

Hamilton American Classic Intra-Matic Auto

h38425120

MSRP $1,275

Formex Reef 42 mm

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

MSRP $2,414

At a glance

11 of 29 specs differ

Diameter

American Classic Intra-Matic Auto40mm

Reef 42 mm42mm

Power Reserve

American Classic Intra-Matic Auto80h

Reef 42 mm56h

Water Resistance

American Classic Intra-Matic Auto50m

Reef 42 mm300m

MSRP

American Classic Intra-Matic Auto$1,275

Reef 42 mm$2,414

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Dial Color

White

Black

Lume

None

Super-LumiNova

Movement

2 specs

Caliber

H-10

Sellita SW300-1

Power Reserve

80h

56h

Pricing

1 specs

MSRP

$1,275

$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.

Hamilton American Classic Intra-Matic Auto

Owners widely praise the Hamilton American Classic Intra-Matic Auto for its thinness, perfect size, and vintage charm, with some preferring its contrasting tachymeter and larger subdials. One owner notes the rotor can be quite loud. The Hamilton American Classic Intra-Matic Auto is considered by some to be the best watch with a 2892 movement for the price. Overall, owners rate the Hamilton American Classic Intra-Matic Auto highly for its vintage charm and wearability at the price.

Reddit·3

Formex Reef 42 mm

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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