Looks like a later head . Am I wrong ?
I think you're right - the head has been changed. I've only seen that head, the one that says '226' on it, in the later cars. Only '54/'55s that I recall. Joe Frazer can likely verify for sure.
It's got the early round shift lever knob.
The seller should hire a decent photographer! Jeez, some of those pics are useless. I like that color on the early ones.