Yes, it's just a bust. That's actually pretty easy to explain. The unfortunate accident he had as a child. He caught his head in a mechanical...rice picker. But other than that, Jordu Schell's sculpture is a perfect presentation of Spock. Be sure to check out Schell's other--often monstrously frightening--sculptures at the link.
Jordu stopped by the NeatoHQ a few months ago. Real nice guy!
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Wow, that's pretty frickin fantastic!
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Here, Spock appears 100% Vulcan.
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