Thanks gte for the point, the Clua bodywork by Serra was initially presented at the Barcelona Trade Fair in June 1956 offering two-stroke mechanics but its production was not started until 1958 with a two-cylinder, flat, four-stroke engine and only of 500 c.c. capacity. Of the 100 units estimated to have been produced, only the existence of 4 is known, two of them restored, although apparently only one has the original mechanics.