I have a 5oz silver octagonal proof version of this incredible piece - which I brought along at the recent Brissy meet. The octagonal gold version is slightly more pricy than the round - and there were sets of 2 pieces sold at the expo in 1915 in San Francisco - for $100 a pop The double sets now sell at auction thu major houses for US$150-180k http://www.greatcollections.com/Coin/41805/1915-S-Panama-Pacific-Exposition-50-Round-PCGS-MS-63-CAC Bargain... I'll take a dozen please (!) x [youtube]http://www.youtube.com/watch?v=w9dFi1vdlRw[/youtube]
