It's kind of a rare time period to see standard Indian motorcycles from as much of their product in 1917 was going to assist America's efforts in World War 1. Also, in looking up the history of Indian I found it interesting that for a period starting in 1923 they dropped the "r" and became Indian Motocycle. All kinds of info like that can be found on this official Indian timeline.
Also, a quick check with Wausau says there's still some room available for the state H.O.G. rally that started today. If you're going please take some pictures for the site and send them in here. Enjoy your weekend and ride safe everyone!