German army HS-30 Schützenpanzer, in its base version as Infantry Fighting Vehicle with a 20-mm cannon. The IFV was designed to be operated by two crewmembers and carry up to six Panzergrenadiers.
Between 1958 and 1962 about 2180 HS30 were made by Leyland, Rheinstahl/Hanomag and Henschel.
Additional info obtained from:

Lutz-Reiner Gau, Jürgen Plate, Jörg Siegert: Deutsche Militärfahrzeuge: Bundeswehr und NVA, Motorbuch, 2001, ISBN 978-3613021525
Karl Anweiler, Rainer Blank: Die Rad- und Kettenfahrzeuge der Bundeswehr 1956 bis heute, Bechtermünz, 1999, ISBN 3-8289-5369-7
Own work
Alexpl