That mean's "The 4 Stroke Motor"
It's a 634cc air cooled horizontally opposed 4 stoke twin from a Deux Deuches.
By the way, who can tell me why the Google search engine can't find this blog .
Crapaud ( Toad ) Theatre is a little street theatre & comedy company, based in Charente Maritime producing shows ( spectacles ) such as "PEACH" "LE MOTEUR A 4 TEMPS" "COMMENT DEVENIR PARFAIT EN 3 JOURS" this blog is intended as a link in our network of publicity.