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<p>[QUOTE=&quot;J Dagger, post: 645680, member: 10944&quot;]It starts shallow on the smaller end and gradually gets deeper on the wide end. I believe that probably serves a purpose in processing whatever it was meant to process. Again could be wrong but that’s my guess. Design had to be pretty pragmatic and ingenious back then. Especially if you were going to take the extensive amount of time it would have taken to chip away at this hard stone.[/QUOTE]</p><p><br /></p>

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