This is a David Watch cloth that came with your Rolex back in 70s. We had only 6 numbers for the telephone...
There were many Rolex AD back in 60-90s, however those are no longer representing Rolex as AD nowadays, this includes Kowloon Watch Company, Capitol Watch Company and This David Watch.
Well, David Watch is still running Watch business in Queen's Road Central nowaday.
The David Watch
The GalleriaShop G04-05, Ground Floor, 9 Queen's Road Central, Central
HK Queens' Road Snob
HK Watch Fever