I used one of these in the early 1960's while working for a Olds and Cadillac dealership . As I remember the Harley was sold for around $800 . It was fun to drive .
The Servicar made by Harley Davidson was the one machine that continued the use of the 45 side valve engine all the way up to 1973. The two wheelers ended with the K model in the early 50s. The engine cases have the G model stamping. Indian and a few others had three wheeled vehicles that were common back in the day. Cushman sort of took it over when they made the enclosed models. I've seen the Cushmans used for parking meter inspection and on many military air fields for all weather movement on the ramps.