In the late '40s Ancora, trying to follow the Parker 51 success, introduced an hooded nib pen, called Calamus. It was a piston filler pen with the same shape and finishes of the Lusso, produced in four different sizes in full metal or with metal cap and plastic body with four different colors: black, gray, burgundy and blue. There were two version of the pen, with a partially covered nib and an gold filled overlaid section, and with fully covered nib. The cap was still made in gold-plated metal with a celluloid inlay in the top, while the body was engraved with the name of the model. The first Calamus models were produced having an enameled logo on the clip. During all the '50s Ancora continued also to produce traditional celluloid models.