Another opposed piston engine in this video at 2:28 :
Also these links have more info:
https://en.wikipedia.org/wiki/Commer_TS3
https://web.archive.org/web/2016050...rg:80/members/diesel/rootes-listerts3/ts3.htm
Also these links have more info:
https://en.wikipedia.org/wiki/Commer_TS3
https://web.archive.org/web/2016050...rg:80/members/diesel/rootes-listerts3/ts3.htm