THIS IS A COLUMBIA  MODEL "C" AUTOMATIC CARBIDE BICYCLE LAMP.  GREEN AND RED JEWELS.  THERE IS A SMALL DING ON TOP OF THE CARBIDE TANK, AS SHOWN IN PHOTOS. SCUFFS AND SOME MINOR SCRA TCHES.  LAST DATE PATENTED IS 1900, SO IT IS OVER 120 YEARS OLD, AND FOUND IN VERY GOOD CONDITION FOR ITS AGE. IT IS 5 1/2" TALL.  SEE PHOTOS.