BOLDR Supply Co. Field Medic IVvsFortis Stratoliner S-41

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

BOLDR Supply Co. Field Medic IV at true scale

Field Medic IV

Fortis Stratoliner S-41 at true scale

Stratoliner S-41

Diameter

38mm

41mm

Lug-to-Lug

44mm

n/a

Thickness

12.2mm

lowest

14mm

Water Resistance

200m

200m

Power Reserve

n/a

60h

MSRP

$299

lowest

$5,450

Movement

Seiko VK64

Fortis WERK 17

Case

5 specs
Diameter
38mm
41mm
Thickness
12.2mm
14mm
Lug-to-Lug
44mm
n/a
Lug Width
20mm
21mm
Material
Titanium
Stainless Steel

Crystal & Dial

1 specs
Dial Color
n/a
White

Movement

5 specs
Caliber
Seiko VK64
Fortis WERK 17
Type
Meca-Quartz
Automatic
Beat Rate
0 vph
28,800 vph
Power Reserve
0h
60h
Jewels
0
36

Pricing

1 specs
MSRP
$299
$5,450
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Reviews

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

BOLDR Supply Co. Field Medic IV

Owners widely praise the BOLDR Supply Co. Field Medic IV for its lightweight, comfortable wearability, with many finding it an appealing daily driver due to its subtle camp and appearance. The 38mm case is noted as compact, and the pulsometer function is considered fun to use, even if not always practical. Some owners appreciate the lack of a ticking second hand, and the lume is described as "extremely cool" despite its short duration. However, the small sub-dials can be difficult to read, and the bead-blasted titanium case is flagged as a scratch magnet. One owner advises against the brand due to past issues with other models. On balance, owners rate the BOLDR Supply Co. Field Medic IV highly for its comfortable, lightweight wearability and unique pulsometer function.

Fortis Stratoliner S-41

Owners widely praise the Fortis Stratoliner S-41 for its intentional orange date wheel, space blue lume, and all-brushed case finishing. Reviewers and owners alike highlight the innovative WERK 17 movement and its purpose-built design for space. However, one owner found it wore too large due to its case thickness and lug-to-lug distance, while another noted the dial's small text and flat design as potential drawbacks. On balance, owners and reviewers appreciate the Stratoliner S-41 for its unique design details and robust build, though its wearability and dial presentation are points of contention for some.

From video reviewers

The Fortis Werk 17 movement—space-tested and manufacture-built—anchors a tank-like tool watch with exceptional lume brightness, anti-reflective dial treatment, and a quality bracelet with quick-adjust clasp. The 41mm case wears considerably larger due to long strut lugs extending to 50.4mm, a utilitarian design choice that dominates wrist presence even on smaller wrists.

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