I have a recently acquired copper pot, and I simply cannot figure out if it is lined with tin or stainless. I honestly never thought it would be hard to tell the difference, but on this pot, I just can't tell! Do any of you know a simple test that would tell me for certain?
Here's why this is so difficult. The pot is a 3.2mm thick Gaillard, which automatically makes me think its tin, but the lining only come up to the inside of the rim (not across the top of the rim), and while the inside of the pot is stained, it looks like stain, not tin darkening. It also has stainless rivets, and the matching lid definitely appears to be a bi-metal. Lastly, on close inspection, the lining just has that stainless look to it.
Please see the photos below, and ignore the tatin in one photo.
Any thought would be appreciated!