1908 Model T touring car is introduced. 1912 Titanic sinks. 1929 Stock market crash leads to Great Depression. The predecessor of today's pocket tape measure was developed and patented by M. Ullrich. A revolution in spirit level technology.
Man lands on the moon.
1980 Introduction of angle setting vials. 1989 Berlin wall torn down. 1991 Soviet Union is dissolved. 1993 Introduction of electronic levels. 1995 Introduction of protractor vials.