About us


Keytime Enterprises Limited is a watch manufacturer located in Hong Kong.
We are one of the few companies that are fully licensed by Hong Kong Government as a radiation source handler specialized in developing GTLS (Gaseous Tritium Light Sources) timepieces.


According to the ordinance of Hong Kong Radiation Board, all GTLS must be handled and assembled by trained and licensed parties. To fulfil the legal requirement, all of the GTLS timepieces are set and assembled in our workshop in Hong Kong.


Keytime is making GTLS watches for many brands and companies around the world. We are providing GTLS contract assembles services, as well as ODM/OEM project assistance to our customers. With our in house design team, engineer and QA team; our aim is to provide one stop GTLS timepiece manufacturing service to our clients.

GTLS handling license from HK Government