in the mid 1950's the Royal Swedish Army Material Administration put out a contract to find a replacement and from this two working groups were filled. Alternative-A ( Anglo-American ) and Alternative-T (Tysk-Fransk ) both the UK/USA and Germany/France respectively, both with different goals. 3/?

Alternative-A was tasked with purchasing a design from either the UK or USA of roughly 50 tons but mounting a heavier gun than the British QF-20 Pounder of their existing Centurion fleet while Alternative-T was to procure a lighter design of 30 tons with less protection but more mobility. 4/?