30PCS Locking Pins Backs Safety Clasp Brooch Badge Bar Jewelry Pins for DIY Craft Name Tags ToyRibbon CorsagesCostume Jewelry Making Sewing Felt Fabric Baby Shower Wedding (Gold, 30MM) - Walmart.com
Five tips on how to date a vintage brooch…. with pictures to help! – The Jewellery Muse Blog
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Dating brooches: clasps (Part 1) – navette jewellery
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Brooch Clasp Pack – Erstwilder
30mm Antique Brass Brooch Clasp Findings Name Tag Pin - Etsy
Dating Brooches by Clasp or Fastening
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DATING BROOCH FASTENERS - Global Gemology - Rare Gems & Jewels