unrestored survivor 1913 Case Model N. 5 are known to still exist according to the museum. It had an acetylene injection starting system. I've never heard of that

CASE produced a variety of motorcars along with their threshers and tractors from 1911 through 1927. Throughout those 17 years, they built a little over 27,000 cars in Racine, WI, and only about 110 have survived.

https://www.facebook.com/photo/?fbid=2095763307600754&set=gm.1771374013588389&idorvanity=825687258157074
 https://www.conceptcarz.com/vehicle/z9174/case-model-n.aspx