1970s Retro Rare NOS Kienzle Life 2002 Jump Hour Wristwatch with Box UnusedThis Watch It all began in 1822 in a town called Schwenningen Germany. Johannes Schlenker made clocks under the Schlenker name. In 1883 Jakob Kienzle married into the Schlenker family renaming the business SCHLENKER & KIENZLE. In 1897 Jakob became the sole owner and Kienzle was founded. Rolls Royce used their clocks from 1910 and in Germany, almost every car had a Kienzle clock in them. The legendary Kienzle 8 day Aviation clock was fitted to aircraft