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.

Field Medic IV

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 specsCrystal & Dial
1 specsMovement
5 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
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.
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.
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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