Fabbricazione e commercio di orlogi "Roskopf" e "genre Roskopf". Annuario svizzero del Registro di commercio, vol 2, p. 2565

http://www.clarowatch.com

In 1967, CLARO Watch SA, in tandem with the von Burg family, initiated its overseas expansion with a sales office in Hong Kong. In 1969, they set up a watch movement assembly factory with BFG, Basis Watch and the Ritz Company in Hong Kong. By the end of 1969, they opened yet another factory in Seoul, South Korea, assembling EB (Ebauches Bettlach) and Ebosa SA Mechanical Movement Calibres. At the time, both the Hong Kong and South Korean operations were among the largest producers in the market, with the von Burg family managing all sales activities.