Hemel HFC Mechanical ChronographvsSeiko Prospex Speedtimer Mechanical Chronograph Limited Edition

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Hemel HFC Mechanical Chronograph at true scale

HFC Mechanical Chronograph

Seiko Prospex Speedtimer Mechanical Chronograph Limited Edition at true scale

Prospex Speedtimer Mechanical Chronograph Limited Edition

Diameter

40mm

42.5mm

Lug-to-Lug

47mm

lowest

50mm

Thickness

13.4mm

lowest

15.1mm

Water Resistance

100m

100m

Power Reserve

n/a

45h

MSRP

$550

lowest

$3,000

Movement

Seagull ST19 (family)

Seiko 8R46

Case

4 specs
Diameter
40mm
42.5mm
Thickness
13.4mm
15.1mm
Lug-to-Lug
47mm
50mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

5 specs
Crystal
Domed Sapphire
Sapphire
Crystal Shape
n/a
Curved
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
Airfoil (1970s British Pilot)
n/a
Lume
None
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Seagull ST19 (family)
Seiko 8R46
Type
Manual
Automatic
Power Reserve
0h
45h
Jewels
0
34

Pricing

1 specs
MSRP
$550
$3,000
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Reviews

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

Hemel HFC Mechanical Chronograph

The Hemel HFC Mechanical Chronograph is praised for its 40mm case size, curved sapphire crystal, and lumed ceramic bezel with 12-hour markers. Owners and reviewers highlight its 100m water resistance and the horological significance of its Seagull ST19 manual-winding movement, particularly at its price point, with some appreciating the exhibition caseback. One owner expressed concern regarding the ST19 movement's reliability. Overall, owners and reviewers rate the Hemel HFC Mechanical Chronograph highly for its vintage pilot's watch aesthetic combined with modern utility and value.

Seiko Prospex Speedtimer Mechanical Chronograph Limited Edition

The Seiko Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition is praised for its well-executed heritage inspiration and clean, balanced dial design, with reviewers noting its stark white dial is inspired by a 1964 stopwatch. Owners find the looks appealing and use the chronograph daily, though some criticize the date window's placement and the 24-hour subdial's lack of GMT functionality. The 42.5mm case is 15.1mm thick and powered by the Seiko 8R46 automatic chronograph movement. Overall, owners and reviewers rate the Seiko Prospex SPEEDTIMER SPEEDTIMER Mechanical Chronograph Limited Edition highly for its attractive aesthetic and purposeful design at the price point.