CVCC stands for Compound Vortex Controlled Combustion, using two combustion chambers and a swirling charge in the main chamber. Honda publicized it on October 11, 1972, licensed it to Toyota, Ford, Chrysler and Isuzu, and put it into production in 1975. The first-generation Civic wagon came only with the 1500 CVCC engine. You're looking at a 1975 Honda CVCC wagon in yellow.