Side by side

Zelos Nasa Edition (sellita)vsSeiko Essentials Quartz

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

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.

Seiko Essentials Quartz

Seiko Essentials Quartz owners praise its high quality and value, highlighting its thin 8.4mm case, sapphire crystal, 100m water resistance, and quartz convenience, with the titanium variant weighing just 50g for exceptional comfort. The polished surfaces can develop fine swirls from daily wear, and the gold plating may wear off edges over time, requiring maintenance. The titanium bracelet's smaller center link creates wider gaps than the steel version, and some owners prefer to remove the 50m-rated watch for showering, especially if it lacks a screw-down crown. On balance, owners rate the Seiko Essentials Quartz highly for its comfortable, lightweight titanium build and convenient quartz accuracy at the price.

At a glance

11 of 29 specs differ
Diameter
Nasa Edition (sellita)39mm
Essentials Quartz40.2mm
Power Reserve
Nasa Edition (sellita)
Essentials Quartz
Water Resistance
Nasa Edition (sellita)50m
Essentials Quartz100m
MSRP
Nasa Edition (sellita)$629
Essentials Quartz$265

Full specifications

Case

5 specs
Diameter
39mm
40.2mm
Thickness
7.6mm
8.3mm
Lug-to-Lug
39mm
47mm
Material
316L Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

3 specs
Crystal
Domed Sapphire
Sapphire
Dial Color
NASA Edition (Sellita)
Lume
None
LumiBrite on Hands

Movement

2 specs
Caliber
ETA/Peseux 7001
6N52
Type
Manual
Quartz

Pricing

1 specs
MSRP
$629
$265
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