It is a salt pot - I'm not sure why it was named a pinch pot.... I think it got that name from the lady I made it for.
I've tried a few experiments with pewter recently. It is quite an interesting material to work with, and can be quite unforgiving to turn. Some of my experiments have been more successful than others - below is a bowl that was a nightmare to turn from start to finish. I attempted to cast pewter directly into the blank I was turning. The result is a bowl I dislike the shape of, and it was only my stubbornness that pushed me to finish it. The wood split, the pewter sections got air bubbles trapped in them - nothing went right. Still, it's all part of the learning curve!