There are two main versions of Yoda known: the regular one with No Coo and strong/dark green head and a very different version with HK Coo, lighter limbs and brown painted eyes. The earlier version could also be confirmed on a LL MOC by now: Ozio’s Report On LL Yoda
Of course there is also Kenner versions known with brown painted eyes, but these always have a much lighter head and painted hands and feet. This early LL version is as unique as its follower. A very rare and sought after variant at the moment.