I didn't know they had Dynel collars in the 1940s. Oh what a travesty!
http://cgi.ebay.com/VINTAGE-WWII-US...oryZ4729QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
http://cgi.ebay.com/VINTAGE-WWII-US...oryZ4729QQssPageNameZWDVWQQrdZ1QQcmdZViewItem