About: http://webisa.webdatacommons.org/143237109

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	Inside the cover is a compartment for storing spare lenses which prevented the eye pieces from fogging up while in use.
http://www.w3.org/ns/prov#wasQuotedFrom	collectorsweekly.com