I’ve added some information regarding the connections between Prest-O-Lite Company, the Indianapolis 500 Race, and the Lincoln Highway.  Check out the additions under the pull down “Nuts & Bolts” menu and select “Starter (Acetylene)- Prest-O-Starter, Prest-O-Lite Company”. https://michiganmotorcar.com/nuts-bolts-2/prest-o-starter-acetylene-starter/