http://www.ebay.com/itm/401069137443

This vintage badge belonged to an employee of the American Bridge Company Shipyard during WWII.

http://www.ebay.com/itm/272129352541

This vintage badge was made worn by an employee of the Kaiser Company Inc- Portland shipyards during WWII.  The badge was made by the Patrick and M.K. Co. of San Francisco, California. It measures 2-3/32″ across.

http://www.ebay.com/itm/272129349404

This vintage badge was worn by an Navy Defense Worker of the C.P.N.A.B, the Contractors Pacific Naval Air Bases. It measures 2″ across and was made by Whitehead-Hoag.