Today's offering showcases this classic and striking Tissot Navigator Sonorous in very pleasing original condition. These watches competed with the JLC Memovox's from the era.

Like the Navigator T12, it's a really cool looking watch and has the distinctive but tastefully done orange alarm originally designed for maximum visibility under water and in low light situations. It doubles as a GMT hand and can be used with the dial's 24-hour marking.

A dual crown watch with full water-resistance, it originally watch allowed active men to now enjoy their sporting and diving activities to an even greater degree.

With its monochrome case with resonating back and dial design with brushing and tiered bezel, it is both elegant and sporty. And measuring 37mm in diameter without the crown, it fills out the wrist well for a vintage watch.

Powering this gem is Tissot's caliber 1748 handwinding movement with date (A. Schild based).

It is 100% original down to both signed crowns. The case presents in excellent condition. The dial is mint. Our watchmaker has freshly cleaned and oiled the movement.

Included with the purchase is a full one-year warranty on the movement and its function, a custom printed Connoisseur of Time Certificate of Authenticity, and a timing certificate attesting to the watch's performance.

Photos of the inside available upon request.

From the collection of notable collector Mack Davis.

Tissot:
Since 1853, the Swiss watchmaker Tissot & Co. has been building quality timepieces, driven by an innovative spirit and a focus on highly skilled craftsmanship. In 1925, Tissot began an important association with Omega. Shortly thereafter (in 1930 to be exact), the SSIH Holding Company (Societe Suisse pour l'Industrie Horlogere) was founded with Omega and Tissot as its first members. In the 1930's the two company's even sold certain watches branded both Omega and Tissot.

• Manufacturer: Tissot
• Country of origin: Switzerland
• Serial no.: 17,302,603
• Year built: 1974
• Model: Navigator Sonogram, ref. 40530-1X
• Functions: Hours, Minutes, Sweep Seconds, Date, Alarm
• Designed for: Men
• Dimensions: 37mm diameter (excluding crowns) by 43mm long
• Case material: Stainless steel
• Case markings (inside): Acier Inoxydable, Ch. Tissot & Fils
• Case condition: Presents as excellent on the wrist. A few light remnants of previous opening marks on the back
• Crowns: Original signed Tissot, waterproof o-ring sealed
• Dial: Signed Tissot, raised bezel with steel baton indices, inner second/minute markings, inner 24 hour marking, aperture for the date, mint condition
• Hands: Original, steel "batons" filled with luminous material
• Movement type: Signed CHS. TISSOT & FILS, caliber 1478, rhodium plated and decorated, shock resistant
• Movement markings: Ch. Tissot & Fils, Seventeen Jewels, 1478
• Jewels: 17 rubies
• Band: Teju lizard, fully stitched, padded, brand new
• Crystal type: Acrylic, excellent
• Serviced: Yes, freshly cleaned and oiled.
• Warranty: 1-year international warranty. Please email concierge@cotwatches.com for details. Your watch is important to us, and we will take care of it for its lifetime. We provide the best after sale care in the business with an experienced team of watchmakers both of whom each have over forty years of experience and a large number of parts.
• Box/Papers: BOX - Connoisseur of Time watch presentation box; PAPERS - Custom printed Connoisseur of Time Certificate of Authenticity; New timing certificate
• Returns: 7 days full refund. 100% satisfaction guarantee

We offer a 100% satisfaction guarantee for all of our watches. If you are in any way unsatisfied with the watch we will fully refund the purchase price anytime within 7 days after the watch has been received. Our goal is to exceed our client's expectations throughout the buying experience.

All watches are packaged carefully and mailed double boxed in specially constructed, reinforced shipping boxes designed for high value items. All watches are sent fully insured with signature required. Most of our domestic shipping is done through FedEx. At times we will also use USPS Express Mail, and we can accommodate most requests for your preferred carrier. International shipments are sent USPS International Express Mail or FedEx.

The purchase price will be the declared value of the merchandise on any required customs forms. The payment of all customs duties, tariffs, and taxes are the responsibility of the buyer.

Also note that water resistance of vintage watches can no longer be guaranteed and is not covered under the watch's warranty. We do not recommend getting a vintage watch wet, even one that was originally designed to be waterproof.

To get an idea of how this watch will look on the wrist, please use the Watch Sizing Guide