Russell D

Attached is a photo I have of my dad sitting on a Mercer that belonged to my grandfather around 1918 or 1920. I sent the photo several years ago to the Harrah's auto museum in Reno, Nevada. I was told it was a highly modified Mercer. Which makes sense, since my grandfather was into selling aftermarket parts for different automobiles at one time. Can anyone tell me what year and model? Photo was taken in Raton New Mexico. Thanks in advance for any help...