A 2C Mag-Lite with a 3C Kel-Lite. I am a Kel-Lite fan, but I only have a couple of them. A 3C Kel-Lite is actually shorter than a 2C Mag because of the Mag's internal switch. The Kel-Lite dates to about 1971 with the serial number on the barrel, but the Barstow tail cap is later, circa 1974...