Lorsa Pilot Chronograph / Slide Rule 'Navitimer-style'
Pilot/Aviation Chronograph with Slide Rule · Lorsa. A brand name potentially resurrecting the historic French movement manufacturer name 'Lorsa' into a boutique or entry-level luxury label.
Period: Modern/Neo-Vintage (2000s). Highly influenced by 1950s-1960s tool watch aesthetics.
Type
Pilot/Aviation Chronograph with Slide Rule
Brand
Lorsa. A brand name potentially resurrecting the historic French movement manufacturer name 'Lorsa' into a boutique or entry-level luxury label.
Movement
Automatic/Self-winding Chronograph. Likely a Valjoux/ETA 7750 or equivalent Asian clone (given the subdial layout at 6-9-12).
Dimensions
Case diameter: 42-44mm, Thickness: 14-16mm, Lug-to-lug: 50-52mm, Lug width: 22mm. Wears large due to the busy dial and chunky bezel.
Description
A robust pilot's tool watch that combines the utility of a flight computer with a modern chronograph. Its design heavily borrows from the Breitling Navitimer but adds a more aggressive, industrial aesthetic through its notched bezel.
Key Features
Functional slide rule for flight calculations, high-contrast red hands, distinct scalloped bezel notches, and a date at 6 o'clock for visual symmetry.
Dial Description
White/Silver dial with a complex slide rule computer. Features three subdials, a date window at 6 o'clock, red accented baton hands, and yellowish-green hour markers.
Case Material
Stainless steel with a mix of polished and brushed surfaces. Notable scalloped outer bezel ring.
Crystal Type
Likely sapphire or high-grade mineral glass. Flat profile with suspected internal AR coating.
Bezel Details
Bidirectional rotating slide rule bezel with a distinctively notched/scalloped stainless steel outer edge for grip.
Crown & Pushers
Large knurled push-pull crown with two standard pump-style chronograph pushers at 2 and 4 o'clock.
Bracelet or Strap
Brown 'Rally' style leather strap with large perforations and white contrast stitching; steel pin buckle.
Caseback Details
Likely a screw-down solid stainless steel caseback or exhibition window showing the rotor/complications.
Movement Type
Automatic/Self-winding Chronograph. Likely a Valjoux/ETA 7750 or equivalent Asian clone (given the subdial layout at 6-9-12).
Water Resistance
Likely 30m to 50m (3-5 ATM). Splash-proof only; not suitable for swimming or diving due to the non-screw-down pushers and rotating bezel gaps.
Origin & Provenance
Brand origin is French (historic); current manufacturing likely utilizes Swiss or Asian components. 'Automatic' movement indicated.
Age Estimate
Circa 2005-2015 based on the case size and modern finishing techniques.
Cultural Significance
Represents the 'Navitimer-homage' category, popular among enthusiasts who appreciate professional aviation tools without the five-figure price tag.
Condition Notes
Appears to be in excellent condition based on the stock imagery; edges are sharp and dial is clean. (Note: Grade: Excellent/Near Mint).
Value Estimate
Estimated market value: $300 - $600 USD depending on the specific movement caliber and rarity of the brand branding.
Care & Maintenance
Service every 5 years for movement lubrication. Avoid high magnetism. Leather strap should be kept dry to prevent rot.
Similar Watches
Breitling Navitimer (the original), Sinn 903 (uses the licensed design), Seiko Flightmaster SNA411 (quartz alternative).
Interesting Facts
The name Lorsa was historically famous as an ebauche manufacturer in Annemasse, France, known for providing movements to many brands before the quartz crisis.