Side by side

Sternglas Naos GroßdatumvsTimefactors PRS-40

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

Naos Großdatum
SternglasNaos Großdatum
MSRP $323
PRS-40
TimefactorsPRS-40
MSRP $315
What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Sternglas Naos Großdatum

The Sternglas Naos Großdatum is praised for its Bauhaus aesthetic and value, with one owner finding it an affordable alternative to other designs. However, some owners report it feels underwhelming and cheap, with a printed-on face, small font, and toy-like hands, and find the strap to be of poor quality. The watch features a 38mm stainless steel case, an Alabaster dial with beige LumiNova, and a Seiko TMI VJ76 quartz movement rated for -20/+20 seconds per month. On balance, owners and reviewers are divided, with the primary point of contention being the perceived quality and aesthetic execution of the Sternglas Naos Großdatum.

Timefactors PRS-40

Owners widely praise the Timefactors PRS-40 for its unique, "badass" and rugged, futuristic design, with many highlighting the 12 o'clock crown as a distinctive and appreciated feature. The bead-blasted finish is noted to show light marks but resists deep scratches, and the sapphire crystal is considered good. While some owners find the 40.2mm case size acceptable, others describe the watch as large and wearing big, though it is noted to wear thinner than an automatic version. The fixed lugs necessitate the use of NATO straps, and the included strap is well-regarded. On balance, owners rate the Timefactors PRS-40 highly for its distinctive, bombproof design and unique crown placement at an accessible price point.

At a glance

13 of 29 specs differ
Diameter
Naos Großdatum38mm
PRS-4040.2mm
Power Reserve
Naos Großdatum
PRS-4040h
Water Resistance
Naos Großdatum50m
PRS-40100m
MSRP
Naos Großdatum$323
PRS-40$315

Full specifications

Case

6 specs
Category
Dress
Diameter
38mm
40.2mm
Thickness
10mm
12.25mm
Lug-to-Lug
42mm
53.5mm
Lug Width
20mm
22mm
Water Resistance
50m
100m

Crystal & Dial

2 specs
Dial Color
Black
Lume
Luminova Punkten
SuperLuminova C3

Movement

4 specs
Caliber
Seiko VJ76
Seiko VK61
Type
Quartz
Mecaquartz
Power Reserve
40h
Jewels
25

Pricing

1 specs
MSRP
$323
$315
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