Hi Len,
This is a 2 candlepower carbon filament lamp manufactured by the Monarch Incandescent Lamp Company. Fairbanks, Morse & Co. was an exclusive selling agent of Monarch Mazda lamps beginning around 1910, but this clearly isn't a MAZDA lamp. As evidenced by your lamp, Fairbanks Morse apparently also sold the carbon filament lamps (older technology) that Monarch offered. I'd guess your bulb dates to around 1910, around the time when carbon filament lamps were being replaced by MAZDA (tungsten filament) lamps.
Thanks for sharing.