Side by side

Spinnaker Cahill AutomaticvsTimefactors SMITHS NATO PRS-40 AUTOMATIC

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.

Spinnaker Cahill Automatic

Owners widely praise the Spinnaker Cahill Automatic for its attractive vintage-inspired design, comfortable wearability on smaller wrists, and good timekeeping, with one owner specifically noting the large "maxi" indices and NATO strap as highlights. However, some find the lume application uneven and note the use of a mineral crystal. A significant concern raised by one owner is a report of internal component failures and a perceived lack of quality control within the brand. On balance, the Spinnaker Cahill Automatic is well-regarded by owners for its style and value, particularly at specific price points, despite some noted manufacturing inconsistencies.

Timefactors SMITHS NATO PRS-40 AUTOMATIC

Owners widely praise the Timefactors SMITHS NATO PRS-40 AUTOMATIC for its unique, "badass," rugged, and futuristic design, with some finding its "ugly" aesthetic appealing for its bombproof nature. The Seiko 6R15 movement winds smoothly and operates quietly, and the watch features 100m water resistance and a flat sapphire crystal. The 12 o'clock crown is noted as easy to use by rolling, and the fixed lugs necessitate NATO straps. Some owners report issues with Timefactors' ordering system and customer service, and one found a speck of dust under the crystal, though another noted no imperfections. Overall, owners rate the Timefactors SMITHS NATO PRS-40 AUTOMATIC highly for its distinctive "beater" watch build and unique aesthetic at the price.

At a glance

11 of 29 specs differ
Diameter
Cahill Automatic42mm
SMITHS NATO PRS-40 AUTOMATIC40.2mm
Power Reserve
Cahill Automatic40h
SMITHS NATO PRS-40 AUTOMATIC50h
Water Resistance
Cahill Automatic200m
SMITHS NATO PRS-40 AUTOMATIC100m
MSRP
Cahill Automatic$350
SMITHS NATO PRS-40 AUTOMATIC$315

Full specifications

Case

7 specs
Category
Diver
Diameter
42mm
40.2mm
Thickness
13.7mm
12.25mm
Lug-to-Lug
51mm
54.7mm
Lug Width
22mm
22mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

1 specs
Dial Color
Green

Movement

2 specs
Caliber
NH35
6R15
Power Reserve
40h
50h

Pricing

1 specs
MSRP
$350
$315
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