Side by side

Zelos Nasa Edition (sellita)vsPhoibos Reef Master

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

Nasa Edition (sellita)
ZelosNasa Edition (sellita)
MSRP $629
Reef Master
PhoibosReef Master
MSRP $335

At a glance

14 of 29 specs differ
Diameter
Nasa Edition (sellita)39mm
Reef Master42mm
Power Reserve
Nasa Edition (sellita)40h
Reef Master40h
Water Resistance
Nasa Edition (sellita)50m
Reef Master200m
MSRP
Nasa Edition (sellita)$629
Reef Master$335

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
39mm
42mm
Thickness
7.6mm
13mm
Lug-to-Lug
39mm
48mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
200m

Crystal & Dial

4 specs
Crystal
Domed Sapphire
Sapphire
AR Coating
Inner
Yes
Dial Color
NASA Edition (Sellita)
Green
Lume
None
Super-LumiNova

Movement

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

Pricing

1 specs
MSRP
$629
$335

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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.

Phoibos Reef Master

Owners widely praise the Phoibos Reef Master for its exceptional value, highlighting its sapphire crystal, DLC coating, and extensive BGW9 lume. The watch is noted for its cool lume, with one owner finding it not bulky despite its robust build. The Shamrock Green dial and texture are highly praised, as is the comfortable bracelet with solid end links. However, the bezel action is described as rough, and the basic folding clasp is a disappointment. Accuracy is reported as excellent, with one owner seeing +-2 sec/day. Some find the 42mm size almost too big for their wrists, and the date window is considered too small. Overall, owners rate the Phoibos Reef Master highly for its impressive feature set and value at its price point.

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