A letter written by Teerlink in the early nineties and sent from the Guangzhou (Kanton) office in China was sealed with a red wax seal depicting a coat of arms divided into quarters; two-quarters with a chevron with a number of five-pointed stars and clover leaves and a garland of roses, both referring to Jan and Betje's mutual ancestors, the Bekkers. It turns out, that the probably unknown coat of arms belonging to the Bekker family, is also depicted on the copper engraving with the coat of arms of the Zeeland 'edele en aensienelijke geslachten' (= noble and patrician families) in the Nieuwe Cronyk van Zeeland (1700) by historian and genealogist Mattheus Smallegange.
