Apartment Door Knocker with DV2 Viewer Part Number:AK4 Category: Door Knockers & Viewers Product PDF: Solid brass. Packed with card holder, use optional. Packed with DV2 viewer. OPTIONAL ENGRAVED TAB: ET1.BLK or ET1.BRN Stocked Finishes: 605 609 613 619 625 716 Post navigation Previous Previous post: Apartment Door Knocker with DV1 ViewerNext post: Door Knocker DK1Next