Watch collecting is one of the most practical hobbies there is. You can collect stamps, postcards, coins, pocketknives, jewelry and many other strange items but none of them will be so useful as a watch. A watch can be admired for it's design as well as historical or technical values but it can also be worn everyday thus being in practical use.LED watches, LED watch, LCD watch, Pulsar, Synchronar, Mercury Time, Nesstime, Ragen, Wittnauer, Compuchron, compu chron, Omega, Hughes Aircraft, Hewlett Packard, HP-01, Uranus, L.E.D., Benrus, Duward, Imado, Citizen, Elektronika, Bulova, Gruen, Litronix, Helbros, Novus, National Semiconductor, Sharp, Sinclair, Texas Instruments