The two photos below are from after the 1970 move of the Canadians from Northern to Southern Germany.
By 1970, Canadian Centurions in Germany had been upgraded to Mk. 11 standard by having the front glacis up-armoured, the main armament upgunned with the installation of the L7A1 105mm gun with a .50-cal ranging machine-gun (RMG), and the installation of infrared kit.
The L7A1 gun is distinguishable by the squared edged, eccentrically mounted fume extractor (as opposed to the concentrically mounted one the 20-pdr) without barrel counterweights. The RMG is installed to the left on the mantlet.
The infrared kit consisted of the light mounted on the forward left side of the turret (it's in the rear cage in the second photo), the dual headlights with guards on the glacis, and 12" spotlights on the commander's cupola.
Other changes made to Canadian tanks, while not visible in the first photo, include the addition of a storage cage on the rear of the turret and a 100 gallon long range (LR) fuel tank on the rear of the tank itself (not visible in either). Sometimes you'll see Canadian tanks referred to as Mk. 11LR online. There were also foot holds cut into the side skirts.
Note that the Centurion has been fitted with the rubber padded "hush puppy" tracks. By 1970 the tanks in Europe were painted in a three-tone CF colour scheme. Two shades of green and black. Also note that the British style markings are gone and the antennae mounts are American.
If you have any further questions, feel free to ask.