Rare Diver Watch Lanco Super Compressor - Military WatchLanco Watch History Langendorf Watch Company was a swiss watchmaker known for its fine craftsmanship and great attention to detail. Around 1890, they were probably the largest producer of watches in the world. The company produced watches in Langedorf, Switzerland for exactly a century, from 1873 to 1973. The most famous brand of the company was Lanco (an abbreviation of Langendorf Watch Company) that was launched as a brand name in the late 1950s.