The water skillet looked fine on the outside, but as you can see, the inside looks like it was used as a planter. The seller had the mis-matched lid sitting on it, and sold them both for one price. I needed a good cleaning challenge this year, so I took up the seller's offer.
I was pleasantly surprised to see how well they both cleaned up. For the price, I thought the lid would be a throw away, and the water skillet would be worth the price. Once the lid went through electrolysis, markings that were not apparent suddenly became obvious.
How many BSR #6 lids have you seen?
The water skillet has a raised #3 on the handle and a gate mark on the bottom.
Here are the before photos: