About: http://webisa.webdatacommons.org/398739503

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	my best guess is that these date from the late 1950s to early 1960s.
http://www.w3.org/ns/prov#wasQuotedFrom	collectorsweekly.com