Look, anyone can make tiny skulls a hundred at a time. The real trick is to make them 104 at a time:
Lot 917Slotin Folk Art Auction, 9:00 AM PT - May 2nd, 2010 [liveauctioneers.com]
Stanley Szwarc. Industrial Skull Molds.
Industrial Skull Molds.26 molds on each plate. 4 plates, top and bottom sets. Provenance: The Clay Morrison Collection to benefit SAIC. Solid aluminum. 13.75x 3" x 1". Est. $100-300.