This is a little Canadian amphibious vehicle called a "Penguin" designed and built by Ed Kay in 1964. The one in the photo was presented to Queen Elizabeth II, by the Canadian government, during her visit to Canada that year. That’s Prime Minister Lester B. Pearson to the left, and his wife, Maryon Pearson, between the Queen and Prince Philip (they are the two with their faces obscured). The vehicle was presented to their Royal Majesties at Prime Minister Pearson’s residence. Kind of a cute little thing, and of course those types of ATV's are all the rage now. Guess it was quite a bit ahead of it's time.