About: http://webisa.webdatacommons.org/410104018

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	One edge I filed a sort of knife edge of about 60 degrees to fit, more or less, the valleys between the checker diamonds.
http://www.w3.org/ns/prov#wasQuotedFrom	thefirearmsforum.com