From late 1944, an ungainly piece of equipment was introduced into service in the British and Canadian armies. Referred to at the time as the 'Valentine 17-pounder SP', and later as the 'Archer', it was a tracked vehicle with an open compartment at the front and a large gun facing to the rear.

Joining me to tell the story of the Archer's development is loyal patron of the show, and author of 'Self Propelled 17 Pounder - Archer', Christopher Camfield.

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