McLaughlin Manufacturing of Berkeley, California

The McLaughling Manufacturing Co. made steam tractors and steam traction engines

Judging by the coke cars this Mclaughlin is pulling, it's probably safe to assume it was employed in the mining industry.
Written in light pencil on the mat backing of this photo are the words "out chain." Note the large selection of chains in the lower left of the photo) Judging by the coke cars this Mclaughlin is pulling, it's probably safe to assume it was employed in the mining industry.