Le Jour Frogman dive watch 11-421, bought in 1977. Comes with original box, papers and proof of purchase.
These notes were written by the person who submitted this item. Appraiser.AI has not verified them, and the AI's identification and estimate may rely on them.
AI Estimated Value
Not an official valuation
$1,500-$2,500
AI estimate as of September 4, 2026 · verify with a professional before acting
AI-Generated · Verify before acting
Everything on this page is generated by AI for informational purposes only. AI can make mistakes — the AI may misidentify items or misattribute them (artist, maker, brand, designer, origin, era). This is not an official valuation and should not be used for insurance, sale, tax, estate, legal, or lending purposes — or any decision requiring a certified appraisal. It is not an authoritative claim about any person, brand, or rights holder — do not share or rely on it as a factual statement about a third party. Always consult qualified professionals before making financial decisions.
This analysis also relies on unverified notes provided by the user, which may be incomplete or inaccurate and could affect the result.
The item depicted in the image is a vintage mechanical wristwatch featuring a vibrant orange dial with luminous round and rectangular hour markers, prominent baton hands, a central sweep seconds hand, and a square date aperture positioned near the three o'clock or twelve o'clock area depending on orientation. The watch includes a wide, circular silver-toned bezel marked with black minute or second graduations and numeric indicators such as 10, 20, 30, 40, and 50. The outer chapter ring has a contrasting black track with white numerical markers. The dial bears visible text reading "LE JOUR" along with additional text reading "AUTOMATIC PROFESSIONAL MARINE". The stainless steel case displays a brushed finish and connects to a textured strap. The visual presentation is consistent with 1970s dive watch aesthetics, displaying minor surface wear and patina appropriate for a vintage timepiece. The identification rests on the legible branding printed on the dial surface, although physical inspection is required to evaluate internal components and overall authenticity. The owner provides unverified context identifying the piece as a Le Jour Frogman dive watch model 11-421, purchased in 1977 and accompanied by original box, papers, and proof of purchase, which remain unverified from the photo alone.
AI Appraisal Report
Based on the provided image, I can observe a vintage mechanical wristwatch featuring an orange dial, baton hands, a revolving bezel, and text reading Le Jour Automatic Professional Marine, presenting an aesthetic consistent with 1970s dive watches. However, I cannot verify internal components, material composition, or overall authenticity from a photograph alone, and a physical inspection would be required to confirm these aspects. The owner supplies unverified context identifying the piece as a Le Jour Frogman dive watch model 11-421, purchased in 1977 and accompanied by box and papers. Assuming this unverified claim is correct and the watch is a functioning vintage Le Jour model with its purported accessories, market behavior for similar 1970s tool watches suggests an estimated value range of $1,500 to $2,500, depending heavily on working condition, service history, and originality of parts. If the item turns out to be a reproduction, replica, or style copy, the market value would drop significantly, typically falling to a fraction of this estimate. To establish legitimacy, the piece would require in-person horological examination, evaluation of the movement, and verification of any accompanying documentation by a qualified specialist.
