Craig Duling

A Successful CEO & Horologist

In his capacity as its president and chief executive officer, Craig Duling leads Heritage Management Services, Inc., a business and property management firm based in San Francisco. His responsibilities include overseeing and mentoring senior executives as well as formulating and implementing the business’ strategic plan. Before accepting his current position, Craig Duling served as an engineer with Lockheed Missiles and Space Company in Sunnyvale, California. While there, he worked on projects sponsored by the United States Armed Forces.

When not working, Craig Duling enjoys coin collecting, a hobby he has pursued since childhood. He belongs to the American Numismatic Association and owns very rare American coins. Besides coins, he collects pocket watches as a member of the National Association of Watch and Clock Collectors.

A family man, Mr. Duling vacations with his wife and two children each summer in Hawaii, where he likes to surf. He also enjoys playing baseball with his children.

For nearly three decades, Craig Duling has led San Francisco's Heritage Management Services, Inc., as president and chief executive officer.

Types of Pocket Watches

Craig Duling is a former engineer and chief executive officer that holds a degree from San Jose State University. Currently, Craig Duling is an antiquarian horologist and manages, a website that provides insights and information on rate timepieces.

Pocket watches are a type of timepiece that often feature a chain that can be secured to a pocket, coat, or belt. Popular prior to World War I, pocket watches come in several types that include the following:

1. Open Case – Also known as an open face watch, the open case watch has no case cover over the crystal. This type of watch is more common in modern times, as watches have become more durable.

2.Full Hunter – A type of watch that includes an outer casing, which was often ornamental, that completely covers the face of the watch.

3.Half Hunter – Although this type of watch features an outer case, a circular shaped viewing window was built in that allows the hands of the watch to be seen.

4.Double Hunter – A variation of the full hunter watch, the double hunter features an outer casing on both the front and back of the watch.

5.Double Half Hunter – A type of watch that combines the double and half hunter watch types. In addition to two outer casings on the front and back, the double half hunter has an opening on the front case that allows the watch hands to be viewed.

The Relationship between Pocket Watch Jewels and Watch Quality

As the administrator of, Craig Duling educates novice enthusiasts and experts of horology about antique pocket watches and other timepieces. On the site, Craig Duling discusses a range of topics, including watch jewels.

A protective element located inside the mechanism of a watch, jewels are placed at pivot and collision points, where they act as a buffer against friction. Simply put, the purpose of jewels is to prevent wear and extend the overall life of a timepiece.

Originally, natural rubies, sapphires, garnets, and diamonds were used in watches, but most jewels used after 1900 are synthetic. Both natural and synthetic jewels are effective at reducing friction because they are very hard and smooth, so metal parts slide easily against them.

Although a watch’s value is often tied to the number of jewels it contains, the jewels themselves are not typically valuable. Generally speaking, a watch with more jewels runs more efficiently and remains more accurate over time. Therefore, the number of jewels is a direct indication of quality.

Basic watches contain seven jewels, but many watches of higher quality contain up to 23 or more jewels. While jewel count is a strong indication of quality, it’s important to remember that a watch does not have to contain a high jewel count to be worth a lot of money. In fact, many expensive pocket watches can be rare or uncommon and do not have a high number of jewels.