Cab129 - 18x13mm sew on cabochon with Black/Yellow strips (1950-60s)

This is a black and yellow stripy glass cabochon and is approximately 18mm by 13mm. The front of the cab is smooth- the back is flat and there are two holes in the cab so it can be sewn onto material. The cabochon was made in 1950-1960 in a factory in Germany which recently closed.