Linhof leveling head.
The Linhof leveling head is essentially a very low-profile ball head with a 15-degree range of motion. Ideal for a large format camera or a heavy lens, this leveling system provides a nice amount of static friction, so your camera wont go flip-flopping everywhere if you let it go. 3/8" fitting at the base for mounting to a support; 1/4" thread at the top for camera mounting. In very good cosmetic condition, with a few minor paint marks. This heavy-duty head supports up to 10kg (~22lb).