Surprise, surprise: the Swiss Army knife was actually invented and made by the ancient Romans around 200 AD. Their version was made of silver and had an iron blade. Apart from the knife, it sported a spoon, a fork, a retractable spike, a spatula and a tooth-pick. What did they use the spike for? Probably to extract meat from snails. And the Spatula? Perhaps to poke cooking sauce out of narrow-necked bottles.
It seems that the Fitzwilliam Museum, where the object is displayed in the UK, has restored it to its old splendor since the above photo was taken: