Comparison between new and old Alvin Draft/Matic pencils. : r/mechanicalpencils
Amazon.com : ALVIN DM05 Draft-Matic Mechanical Pencil, 0.5mm, Stainless Steel Drawing and Design Tool for Students and Professionals, Great for Drafting, Architecture, Engineering, and Art : Office Products
Draft/Matic Pencil Collection Set of 3 – ALVIN Drafting, LLC
Amazon.com : ALVIN DM07 Draft-Matic Mechanical Pencil, 0.7mm, Stainless Steel Drawing and Design Tool for Students and Professionals, Great for Drafting, Architecture, Engineering, and Art : Alvin Draftmatic : Office Products