Side by side

Massena LAB GeometervsSeiko Prospex SPEEDTIMER Mechanical

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

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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.

Massena LAB Geometer

Massena LAB is lauded for its vintage-inspired designs, with reviewers highlighting the attractive sector dial and glossy black dial with gilt printing. The manual-winding SW510 Elaboré movement is noted, and the 39mm case is described as polished stainless steel. Some find the minute and hour hands difficult to distinguish, and one reviewer criticized the dial for only displaying Massena's name. The price points mentioned range from $5,995 to $8,675. Overall, reviewers rate Massena LAB highly for its vintage aesthetics and value, particularly noting the striking dials and modern horological touches.

Seiko Prospex SPEEDTIMER Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is praised for its visually appealing design and comfortable wearability, with owners frequently using its chronograph function for daily tasks. Reviewers note its clean dial layout and LumiBrite treated hands and markers, and one source highlights the 72-hour power reserve of the 6R55 movement. However, some owners criticize its chronograph functionality and the 24-hour subdial. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its daily usability and refined aesthetics.

At a glance

15 of 29 specs differ
Diameter
Geometer39mm
Prospex SPEEDTIMER Mechanical39.5mm
Power Reserve
Geometer58h
Prospex SPEEDTIMER Mechanical72h
Water Resistance
Geometer50m
Prospex SPEEDTIMER Mechanical200m
MSRP
Geometer$3,495
Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

5 specs
Diameter
39mm
39.5mm
Thickness
9mm
12mm
Lug-to-Lug
0mm
44.5mm
Lug Width
0mm
20mm
Water Resistance
50m
200m

Crystal & Dial

5 specs
Crystal
Acrylic
Sapphire
Crystal Shape
Domed
Curved
AR Coating
No
Anti-reflective coating on inner surface
Dial Color
Brown
Lume
Cream
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW510
Seiko 6R55
Type
Manual
Automatic
Power Reserve
58h
72h
Jewels
23
24

Pricing

1 specs
MSRP
$3,495
$995
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