About: http://webisa.webdatacommons.org/13212584

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	As for serial numbers (and a lot of information on price and history) there is a wealth of information at Mike's Praktica Collection
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com