Bar Pins Brooch Clasp Pin Backs Safety Pin 120 Pieces Silver for Name Tags, Badges (4 Sizes 20mm 25mm 32mm 38mm) - Walmart.com
Brooches & pins - TextileGarden
Dating Brooches by Clasp Fastenings - AC Silver Blog
Dating brooches: clasps (Part 1) – navette jewellery
Dating Brooch Fasteners - 1850 to 1910
How to Identify and Date Old Brooch Styles
Jewelry | Dating Fasteners | Early 'Safety' Catches Handmade, ca. 1890-1910+ | Editor note: Push-pull or Trombone catches were not … | Jewelry facts, Brooch, Dating