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<p>[QUOTE=&quot;808 raver, post: 238558, member: 4654&quot;]These two holes (not really holes) were where the vents were when this was cast in green sand, when they poor the molten metal in the green sand mold the metal cools, if you don&#039;t have a reservoir of molten metal above (gravity feed) to fill the shrinkage from the part you need to cast as it cools&nbsp; a void will accrue in the part your are trying to cast. You can also see how the brass has been worn smooth by many many years of fingers changing the days for each month, this would have only happened once a month, just one of the reasons I think this is very very very old.[/QUOTE]</p><p><br /></p>

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