Complex sentence: In 1952 The Autocar retailed for one shilling, equivalent to five pence in post decimalization British currency: by 1972 the price had increased fivefold to twenty-five pence.
Split into simpler sentences: In 1952 The Autocar retailed for one shilling, equivalent to five pence in post decimalization British currency. By 1972 the price had increased fivefold in the two decades since 1952, to twenty-five pence.