Streamlight 2C

This 2C flashlight is estimated to be from shortly after 1983. Streamlight acquired Kel-Lite in 1983, obtaining its designs, molds, and factory. Between 1983 and 1989, many C and D cell flashlights were produced using Kel-Lite's factory and molds, in addition to their own rechargeable models. Flashlights from this period often had markings from both California and Pennsylvania on the tail cap. 

This particular 2C flashlight is very rare, and some parts are likely inherited from Kel-Lite. The battery is inserted at the tail, and the head features a rotating switch, but it does not have adjustable focus.