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YARR=02/55, so your camera was made in February 1955.
My oldest is 1949 which was one of the first models, with the metal advance knob. If I'm not mistaken, its a Canadian model. There were three versions of the Hawkeye - one made in Rochester NY, one made in Canada, and a third that was made in France I believe.
There is some good information here if you haven't seen this page before: http://www.brownie-camera.com/