Nice find there buddy! Before I started making wine My father-in-law had some supplies from when he was alive. To help sell their house we had to fix it up a bit and traded a guy that was replacing the chimney cap and doing some concrete work up there to. I traded him 2 carboys(5 or 6, not sure), a hydrometer, 2 airlocks just like the 1's you just found and a recipe book. Wish I had started making wine a few years earlier.