Usually when things are complicated, it means more stress, more work, and more effort, but in the end, it's worth it. The same holds true for vintage wristwatches, where gifted artisans and engineers from years gone by labored months and years to create complicated timepieces that transcend art and talent. When it comes to vintage wristwatches, the highest realms of respect and value are reserved for these watches that do much more than merely tell time.

The very fine, complicated Swiss wristwatch featured in today's offering is a prime example of this phenomenon. It is in 100% all-original condition down to even the original crystal.

Was it sold by a manufacturer whose perceived brand value make it a five-figure watch? No. But was it finely crafted with heaps of capabilities that would make purists collectors mouth water? I think so. Complex even in comparison to many of today's watches, it displays the month, date, and day of the week along with the phases of the moon. When set correctly it is a display of incredible precision to top a deserving gentleman's wrist.

On top of its triple calendar moonphase functions it added automatic winding - a bi-directional winding one at that! - to the movement, something that less than a handful of watch movements did at the time.

Resulting from a partnership between the two fine Swiss firms Semca and Ebauches S.A., which became ETA, it is powered by the Bidynator 693 engine. Utilized by premier firms like Breitling and Gubelin, a Swiss retailer similar to Tiffany & Co., the 693 is a well-designed caliber.

So well designed, in fact, that DuBois et Fils decided to use a stash of new-old-stock Bidynator movements sitting in storage since the '50's to power their DBF006 collection. Even the basic time and date only models in steel in the collection all have retail prices that start at over $4,000 and climb to over $5,000 - in steel with no additional complications. So confident are they in the Bidynator's reliability that instead of offering a usual two-year warranty, they come with a five-year warranty!

Our triple calendar with moonphase Bidynator powered beauty has a full sized 14K case which is the same size as a Rolex Datejust. It is in gorgeous original condition and has never polished. The facets and lines are crisp. Our photos couldn't begin to do it justice.

Its balanced, complicated two-tone dial, which has both luminous and a red date track, is original and untouched with only light aging and toning. And its fine movement is very clean. Photos of the inside available upon request.

One of our Master Watchmakers has disassembled it down to its last screw and cleaned and oiled it. It is running strong and true, keeping time essentially on par with a new, modern high-end brand's watches.

For the finishing touch, we have equipped it with a brand new crocodile strap making it ready for immediate enjoyment.

Included with the purchase is a one-year C.O.T. international warranty on the movement and its function, a full-page custom printed Connoisseur of Time Certificate of Authenticity, and a new timing certificate attesting to its performance.

• Manufacturer: Semca
• Country of origin: Switzerland
• Year built: 1950's
• Functions: Hours, Minutes, Day, Date, Month, Moon Phase, Automatic Sweep Seconds
• Model: Triple Date with Moonphase
• Designed for: Men
• Case material: Solid 14K gold
• Case markings (outside): Case number
• Case markings (inside): Semca Watch Co., Swiss, 14K
• Case condition: Essentially mint with the slightest bit of wear. It is in gorgeous original condition and has never polished. The facets and lines are crisp. Our photos couldn't begin to do it justice.
• Dimensions: 36mm wide, 44mm long lug tip-to-tip
• Dial: Two-tone silver, outer red date track, dial notes its use of Incabloc shock resistance and 17 jewels, apertures for day, month, and moon phase, sub dials in English, original and untouched, excellent condition with only light aging and toning
• Hands: Original, luminous gold "dauphine" hour and minute hands, red tipped date
• Movement markings: Bidynator, Semca Watch Co.
• Jewels: 17 rubies
• Band: Crocodile, fully stitched, padded, brand new and unworn
• Width between lugs: 18mm
• Crystal: Acrylic, original, very good condition
• Timing: Timed to precision on a state-of-the-art computerized system. It is running strong and true, keeping time essentially on par with a new, modern high-end brand's watches.
• Serviced: One of our Master Watchmakers has disassembled it down to its last screw and cleaned and oiled it.
• Warranty: 1-year C.O.T. international warranty. 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 extremely experienced team of four Master Watchmakers all of whom each have over thirty-five years of experience and a large number of parts. One used to be the watchmaker for an authorized Rolex dealership and was given special training by Rolex at their Beverly Hills Service Center.
• 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