This site is of disputed antiquity. If you have any information that could help clarify this site's authenticity, please post below or leave a post in the forum.
The way this has been 'restored' onto the church boundary wall, makes it look like one with the large (probably originally standing) stone underneath it. I don't think this is the case though. Andrew Langdon in 'Stone Crosses of West Penwith' states that "the shaft and base no longer exist".