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Guide to D1 Refills – Ian Hedley ASGFA
Kaweco Soul D1 Ballpoint Pen Refill - 1.2 mm - Blue - Pack of 5 | JetPens
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Cross Mini Ballpoint 8518 (D, D1) Refill - The Pen Refill Guide
Parker Compatible Mini Ballpoint Pen Refill - D1 Mini Pocket Pen Refills | eBay
Jaymo Replacement for Cross 8518-6 and Schmidt 635 - Measures 2.625 in / 67 mm Long - D (D1) Standard Multifunction Mini Ballpoint Pen Refill - 6 Blue - Walmart.com
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