Side by side

Oak & Oscar The Humboldt GMTvsTornek-Rayville TR-660 Sapphire Non-date

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

The Humboldt GMT
Oak & OscarThe Humboldt GMT
MSRP $2,175
TR-660 Sapphire Non-date
Tornek-RayvilleTR-660 Sapphire Non-date

At a glance

15 of 29 specs differ
Diameter
The Humboldt GMT39.5mm
TR-660 Sapphire Non-date40mm
Power Reserve
The Humboldt GMT56 hoursh
TR-660 Sapphire Non-date50h
Water Resistance
The Humboldt GMT200m
TR-660 Sapphire Non-date200m
MSRP
The Humboldt GMT$2,175
TR-660 Sapphire Non-date

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
39.5mm
40mm
Thickness
12.5mm
14.7mm
Lug-to-Lug
46.8mm
48.5mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed
Brushed and polished
Caseback
Solid screw-down
Solid

Crystal & Dial

4 specs
Crystal Shape
Double-domed
Flat
AR Coating
Underside
Yes
Dial Color
White
Black
Lume
Super-LumiNova
Superluminova

Movement

3 specs
Caliber
Sellita SW330
TMI NH38
Beat Rate
4 vph
28,800 vph
Power Reserve
56 hoursh
50h

Pricing

1 specs
MSRP
$2,175

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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.

Oak & Oscar The Humboldt GMT

Oak & Oscar The Humboldt GMT owners widely praise its exceptional accuracy, often running at or near 0 seconds per day, and its comfortable wearability with subtle design details. The construction quality for the price point, sandwich lume, and anti-magnetic properties are also highlighted. Some owners find the bracelet sizing adjustment slightly awkward, and one noted the lume could be brighter. Overall, owners rate the Oak & Oscar The Humboldt GMT highly for its accuracy and comfortable wearability.

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.

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