The Swedes kept the Centurion in service for quite a few years, and just before the end of the Cold War they decided to do a significant upgrade to the hull and turret, making Strv 104, one of the most capable Centurions to see service. It was withdrawn in 2000.
The Aussie Cent was a 5/1, memory fail.
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The Chieftain (Real name Nicholas Moran) is Wargaming America's resident tanker and amateur historian.