Side by side

Seiko Prospex SeavsUndone Basecamp Collector

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.

Seiko Prospex Sea

Seiko Prospex Sea models are widely praised for their excellent build quality, value for money, and comfortable wearability, with many appreciating the vintage-inspired designs and robust construction. Owners note the silicone straps are surprisingly comfortable and well-finished, and the Lumibrite lume is excellent. However, some find the 44.3mm size and thickness too large for smaller wrists, though others report the sizing as perfect. The 6R15 movement in some variants offers accuracy around +4 seconds per day with a 50-hour power reserve, while newer movements offer more. Some models are criticized for a bracelet width not matching the case size or a rudimentary clasp for their price point. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its impressive case work and finishing at its price point.

Undone Basecamp Collector

The Undone Basecamp Collector is widely praised for its vintage-inspired design and excellent value, with owners appreciating the customization options and helpful service. Reviewers highlight the 40mm steel case and the bi-directional bezel with good friction. Some owners report accuracy around 20 seconds off per week, while others note the Seiko NH35 movement requires occasional time adjustments. The watch features a domed crystal and a lumed triangle on the bezel. The base price is around $300. Overall, owners and reviewers rate the Undone Basecamp Collector highly for its attractive design and value at the price point.

At a glance

14 of 29 specs differ
Diameter
Prospex Sea41.3mm
Basecamp Collector40mm
Power Reserve
Prospex Sea72h
Basecamp Collector
Water Resistance
Prospex Sea300m
Basecamp Collector100m
MSRP
Prospex Sea$1,100
Basecamp Collector$695

Full specifications

Case

7 specs
Category
Diver
Diameter
41.3mm
40mm
Thickness
12.5mm
0mm
Lug-to-Lug
48.2mm
0mm
Lug Width
20mm
0mm
Material
Stainless Steel
Titanium
Water Resistance
300m
100m

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
Dial Color
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
6R55
Seiko NH34
Power Reserve
72h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$1,100
$695
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