Elsener's first SAK toothpick, 1902, was, they say, of ivory,
but I've never heard of a one made of gold. Hand-done by somebody? Does it have a tiny stamp on it someplace?
The SAK Owner's Manual has a photo showing a Wenger faux-tortoiseshell toothpick, from the days of their large-headed T & T. Maybe yours is brass like the slightly golden (or even verdegris green) head of old brass-headed tweezers. ?