Side by side

Feynman Timekeepers Feynman OnevsMKII Hellion

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

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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.

Feynman Timekeepers Feynman One

The case finishing, with its contrast between brushed sides and polished bezel, is a notable strength. The bracelet's end links do not perfectly align with the case, creating a slight gap.

MKII Hellion

The MKII Hellion is widely praised for its immaculate fit and finish, with a mirror-polished case that bridges field and dress styles. Owners appreciate its vintage-inspired lug design and the satisfying heft that balances classic appeal. The large crown is a noted feature, adding a masculine touch to the refined design. One owner questions if the price aligns with the specifications. Overall, owners rate the MKII Hellion highly for its exceptional finishing and versatile, refined design at the price point.

At a glance

9 of 29 specs differ
Diameter
Feynman One39mm
Hellion39mm
Power Reserve
Feynman One
Hellion
Water Resistance
Feynman One50m
Hellion100m
MSRP
Feynman One$1,045
Hellion$649

Full specifications

Case

3 specs
Thickness
11.5mm
13.55mm
Lug-to-Lug
48.5mm
Water Resistance
50m
100m

Crystal & Dial

3 specs
Crystal
Sapphire
Dial Color
Sweet Orange
Black
Lume
None
SuperLuminova

Movement

2 specs
Caliber
ETA/Peseux 7001
Seiko NH38
Type
Manual
Automatic

Pricing

1 specs
MSRP
$1,045
$649
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