As they are from 1960's doubt if they are HEPA. *LOL*
http://cgi.ebay.com/36-VINTAGE-HOOV...5QQihZ015QQcategoryZ43524QQrdZ1QQcmdZViewItem
http://cgi.ebay.com/36-VINTAGE-HOOV...5QQihZ015QQcategoryZ43524QQrdZ1QQcmdZViewItem
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