Formex Reef 42 mmvsTudor Black Bay 68
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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.

Reef 42 mm

Black Bay 68
Diameter
42mm
43mm
Lug-to-Lug
47mm
n/a
Thickness
11.4mm
lowest
13.6mm
Water Resistance
300m
highest
200m
Power Reserve
56h
n/a
MSRP
$2,414
n/a
Movement
Sellita SW300-1
Tudor MT5601
Case
5 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Formex Reef 42 mm for its comfortable bracelet with a micro-adjust clasp and its overall build and finish, with one owner strongly recommending it. Reviewers highlight its impressive wearability and versatility, noting the COSC-certified Sellita SW300-1 movement and well-finished bracelet. One owner found the lugs' taper hinders third-party strap fit and observed the seconds hand does not perfectly align with markers. On balance, owners and reviewers rate the Formex Reef 42 mm highly for its comfortable bracelet and solid build at its price point.
The Tudor Black Bay 68 is praised for its rugged build, refined steel bracelet without faux rivets, and METAS Master Chronometer-certified MT5601-U movement. Owners report a solid ownership experience, with the 43mm case offering good wrist presence and balanced proportions, wearing surprisingly well for its size. The T-Fit clasp is a welcome upgrade, and accuracy is noted at -2/+4 seconds per day with a 70-hour power reserve. However, the 43mm case size is a point of contention, considered too large for many wrists, though some owners with larger wrists find it fits perfectly and gets significant wrist time. The lack of strap options at launch and the 200m water resistance matching smaller models are noted drawbacks. One owner found the Tudor Black Bay 68 a bit heavy and ordered a leather strap to mitigate this. The Tudor Black Bay 68 has been removed from Tudor's website.
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