Craig Duling, an antiquarian horologist, is a former engineer that currently serves as the CEO of Heritage Management Services. Craig Duling also owns and operates Heritagepocketwatch.com, where he applied his expertise in the evaluation of antique timepieces.
When evaluating pocket watches, it is important to assess the quality of the movement as well as the condition of the dial and case. Jewels are an important watch component that help to reduce friction at movement pressure points and ensure the watch operates correctly over a long period of time.
Pocket watch jewels come in several forms, including round shaped hole and cap jewels, angled pallet jewels, and pin style impulse jewels. Jewels can be set with friction, where they are pressed into a tight hole that keeps them secured. Watches with friction set jewels are typically less expensive and lower quality. Another method to set jewels includes the use of small screws which attach to the movement plate. Screw set jewels can be flush with the plate or a raised style where the setting’s rim is slightly elevated. Watches with screw set jewels are often higher quality pieces.
Craig Duling’s love for rare antique pocket watches inspired him to create a website to share his knowledge. At HeritagePocketWatch.com, fellow collectors and interested readers can find out the history of pocket watches and accessories of all types. Craig Duling provides extensive information on luxury brands such as Rolex, Patek Philippe, and the less-well-known, but equally stunning Vacheron Constantin.
In 1755, Jean-Marc Vacheron signed-on his first apprentice in his Geneva, Switzerland, watchmaking workshop, and a legendary company was born. That year also marked the manufacture of the earliest known of Vacheron’s extant works, a silver pocket watch.
Jean-Marc’s son Abraham continued in his father’s trade. Abraham Vacheron married the daughter of another watchmaker, and eventually went into business with his father-in-law as A. Vacheron Girod.
Jean-Marc’s grandson Jacques Barthélémi Vacheron took over in 1810 and expanded the family business considerably. Under Jacques Barthélémi’s leadership, the company began to acquire clients from Europe’s royal houses and to produce even more complex mechanical marvels, including musical timepieces. It was Jacques Barthélémi who concluded the partnership with entrepreneur François Constantin.
Vacheron Constantin has produced masterpieces such as an 1824 watch whose case shows a map of Italy done in enamel of varying shades of light and dark blue, with yellow gold traceries. The company is additionally renowned for its production of pocket chronometers, such as a fine precision piece manufactured in 1869, during the time of major European explorations of the world. The brand remains an icon today.
Craig Duling serves as CEO of the San Francisco company Heritage Management Services, Inc., and devotes time to philanthropic endeavors. In addition, Craig Duling has studied and collected antique pocket watches for four decades. He shares his love of pocket watches and their history on his website HeritagePocketWatch.com, where readers will find advice on collecting and appraising watches, as well as articles on their history.
With Smithsonian magazine calling the pocket watch the “first wearable tech game changer” in the world, the importance of the pocket watch to human civilization is readily apparent. The precise origins of the pocket watch may be lost in history, although medieval people were familiar with mechanical clockworks. Renaissance-era portraits show men holding watches of various types suspended from ribbons or chains, in an era where simple mainspring technology flourished.
Some authorities believe the pocket watch was invented by Italian makers in the 15th century. Many others point to Peter Henlein, the Nuremberg watchmaker and creator of a single-hand device early in the 16th century. In any case, both men and women were using portable watches in the 1500s. The earliest models were egg-shaped and bulky, but they were soon replaced by flatter case shapes.
King Charles II of England is said to have popularized the securing of pocket watches by chains. When he introduced the wearing of waistcoats in the late 17th century, he provided men with a fashionable way to carry their pocket watches.
Pocket watch collector Craig Duling is the expert behind http://www.heritagepocketwatch.com. Craig Duling’s website showcases his collection of rare and ornate watches and provides a wealth of information about the history and inner workings of various timepieces.
Timepieces that are based on pendulums or springs require winding to help them keep time. Winding is a form of stored energy, which gradually depletes through friction, air resistance, and other forces.
Quartz watches use a battery in place of a winding mechanism. A battery can store enough energy to run a timepiece well for years. In a quartz clock, the battery delivers energy to a small crystal. This crystal will always vibrate at a specific frequency: 32,768 times per second. An electronic circuit in the timepiece is able to count these vibrations, which allows it to generate a small electric pulse exactly once a second.
These repetitive electronic pulses keep time just like the escapements in a mechanical timepiece. They can be used to turn gears that move timepiece arms, or they can be used to power a small display in a digital timepiece.
The chief executive officer of Heritage Management Services in San Francisco, California, Craig Duling is an avid collector of antique American pocket watches. One of the rarest timepieces in Craig Duling’s collection is a gold pocket watch made by the Nashua Watch Company.
The movement of this particular watch is top notch and better yet, its original components are untouched. The dial is also in impeccable shape. The only observable flaw is that the watch’s case is slightly worn. However, the value of the Nashua watch is not solely rooted in its relatively good condition, but also has something to do with its history. With over 40 years of experience when it comes to collecting timepieces, Mr. Duling knew that the Nashua Watch Company produced only four pocket watches with 20-size keywind keyset movements. In addition, the Nashua Watch Company employed Nelson P. Stratton, one of the most prominent innovators in the field of horology, further increasing the value of the watches that they made.