About: http://webisa.webdatacommons.org/220037067

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Proofs were made to be saved, not to be spent; but in times of hardship proofs were spent and the locus classicus is gold proofs (see below during the 1880-1893 period especially in the eagles and double eagles).
http://www.w3.org/ns/prov#wasQuotedFrom	pcgs.com