Blueprints of Canadian inventions design type (#2558)

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Canada 6/27/1986 34c issue=Canada Day 1986 d=rotary snowplow & blueprint perf=13.25

Canada 6/27/1986 34c issue=Canada Day 1986 d=Canadarm perf=13.25

Canada 6/27/1986 34c issue=Canada Day 1986 d=Antigravity Flight Suit perf=13.25

Canada 6/27/1986 34c issue=Canada Day 1986 d=Variable Pitch Propeller perf=13.25

blueprints of Canadian inventions design type