Salt-glaze stoneware mug error. Piece of stoneware sticking out out exterior side (so that the mug cannot sit flat). Large block of stoneware resting on interior bottom as well.
Two salt-glaze stoneware mugs mistakenly attached together. One of the mugs appears to have had a piece fall into it from above, causing one mug to tilt into the second. Tilted mug's handle is broken off.