Which is bigger, the Tornek-Rayville TR-660 Sapphire Non-date or the Tudor Black Bay?

The Tudor Black Bay wears larger at 41mm versus 40mm for the Tornek-Rayville TR-660 Sapphire Non-date — a 1mm difference across the dial.

Which has a longer power reserve, the Tornek-Rayville TR-660 Sapphire Non-date or the Tudor Black Bay?

The Tudor Black Bay carries a 70-hour power reserve against 50 hours on the Tornek-Rayville TR-660 Sapphire Non-date.

What movement does the Tornek-Rayville TR-660 Sapphire Non-date run compared to the Tudor Black Bay?

Both watches run automatic movements — the Tornek-Rayville TR-660 Sapphire Non-date uses the TMI NH38 and the Tudor Black Bay uses the MT5602.

Side by side

Tornek-Rayville TR-660 Sapphire Non-datevsTudor Black Bay

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

Tornek-Rayville TR-660 Sapphire Non-date

tr-660-w-sapphire-inlay-1201-non-date-3167895

Tudor Black Bay

m79230g-0001

At a glance

10 of 29 specs differ

Diameter

TR-660 Sapphire Non-date40mm

Black Bay41mm

Power Reserve

TR-660 Sapphire Non-date50h

Black Bay70h

Water Resistance

TR-660 Sapphire Non-date200m

Black Bay200m

MSRP

TR-660 Sapphire Non-date—

Black Bay—

Full specifications

Case

5 specs

Diameter

40mm

41mm

Lug-to-Lug

48.5mm

46mm

Lug Width

20mm

22mm

Finish

Brushed and polished

Polished + Satin

Caseback

Solid

Engraved

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Lume

Superluminova

None

Movement

2 specs

Caliber

TMI NH38

MT5602

Power Reserve

50h

70h

Pricing

1 specs

MSRP

—

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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.

Tornek-Rayville TR-660 Sapphire Non-date

Owners widely praise the Tornek-Rayville TR-660 for its quality, good timekeeping, and suitability as a military diver reissue. The 40mm bead-blasted 316L stainless steel case, sapphire bezel inlay, and Arclite Super LumiNova are noted features, powered by a Japanese TMI NH38 automatic movement and water-resistant to 20 ATMs. Some owners suggest alternatives due to availability issues with the small-batch releases. Overall, owners rate the Tornek-Rayville TR-660 highly for its faithful reissue design and quality build at its price point.

WatchUSeek·3

Tudor Black Bay

Owners widely praise the Tudor Black Bay for its comfortable wearability, robust build, and vintage-inspired aesthetics, with specific mentions of its satisfying winding feel and sturdy bezel action. Reviewers highlight the 39mm Black Bay 58's comfortable size and thinness, while others note the 41mm Master Chronometer's reliable timekeeping and magnetic resistance. Some owners find the GMT hand difficult to distinguish in low light. A recurring point of contention across multiple sources is the lack of on-the-fly micro-adjustment on the bracelet, though some find aftermarket solutions adequate. One owner reported the watch losing two minutes a day after six years, requiring a service. Overall, owners and reviewers rate the Tudor Black Bay highly for its blend of vintage charm, modern robustness, and comfortable wearability.

From video reviewers

The COSC-certified accuracy of the movement is a notable strength. The 14.7mm to 14.8mm thickness is cited as a potential drawback. Reviewers are divided on whether the newer models represent a departure from the Black Bay's heritage design.

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