RIGIVA (RIVA) Millers Full-range Sales & Technical Specification Catalogue 1956 RIGIVA (RIVA) Full Range (conventional machines) Sales & Technical Specification Catalogue dated 1956. Horizontal, Vertical and Turret Millers Types: U.6, U.8, U.20, V.20, V.20b and C400. Accessories, vertical heads, etc. 18 pages. Manufacturers: Rigiva Riva Models: U6 U8 U20 V20 V20b C400 Contents: Catalog