Side by side

Zelos Nasa Edition (sellita)vsHamilton American Classic Intra-Matic Chronograph H

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

Nasa Edition (sellita)
ZelosNasa Edition (sellita)
MSRP $629

At a glance

11 of 29 specs differ
Diameter
Nasa Edition (sellita)39mm
American Classic Intra-Matic Chronograph H40mm
Power Reserve
Nasa Edition (sellita)40h
American Classic Intra-Matic Chronograph H60h
Water Resistance
Nasa Edition (sellita)50m
American Classic Intra-Matic Chronograph H100m
MSRP
Nasa Edition (sellita)$629
American Classic Intra-Matic Chronograph H$2,495

Full specifications

Case

6 specs
Category
Dress
Chronograph
Diameter
39mm
40mm
Thickness
7.6mm
14.35mm
Lug-to-Lug
39mm
49mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

2 specs
Crystal
Domed Sapphire
Sapphire
Dial Color
NASA Edition (Sellita)
White

Movement

2 specs
Caliber
ETA/Peseux 7001
H-51
Power Reserve
40h
60h

Pricing

1 specs
MSRP
$629
$2,495

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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.

Zelos Nasa Edition (sellita)

The Zelos Nasa Edition (sellita) is praised for its thinness, stemming from its hand-wound Sellita SW215 movement, and is noted for its good size and wearability. The watch features a 39mm case, a 45mm lug to lug, and a 20mm lug width. On balance, owners rate the Zelos Nasa Edition (sellita) highly for its comfortable dimensions and thin profile.

Hamilton American Classic Intra-Matic Chronograph H

The Hamilton American Classic Intra-Matic Chronograph H is widely praised for its attractive vintage-inspired design, clean dial legibility, and satisfying manual-wind experience. Owners and reviewers highlight its retro charm, often described as elegant and classy with a 1960s aesthetic, and its well-balanced panda or reverse panda dial configurations. The H-51 hand-wound movement is noted for its torquey feel and a 60-hour power reserve, with timekeeping reported around +3 seconds per day. The 40mm case size is considered welcome, though its 14.35mm thickness is frequently mentioned as being on the thicker side for a hand-wound chronograph, despite wearing well on the wrist. Some owners expressed a desire for a three-subdial layout, and one noted the OEM strap was utilitarian, while another found the rotor audible and the date setting unusual. The Hamilton American Classic Intra-Matic Chronograph H is priced around $2,045 to $2,095 on bracelet.

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