Red Seal Notes
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Blue Seal and Lime Green Seal Notes
Shop current Blue Seal notes from DD Collectables LLC on eBay.
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As lifelong collectors, we saw that true archival-quality currency displays were often overpriced, while cheap acrylic and PVC holders risked damaging valuable notes. We knew there had to be a better option.
By combining numismatic knowledge with modern 3D printing and precision design, we created Serial Shield 3D™ — a collector-focused line built around optically clear archival-quality polyester PET windows, clean presentation, reusable construction, and practical storage solutions.
Today, D.D. Collectables offers collector-grade currency frames, modular PETG storage systems, and custom 3D printing services in San Antonio for collectors, hobbyists, and creators nationwide.
Our mission remains simple: help collectors protect, organize, and showcase what matters most without compromising quality, clarity, or affordability.
🛠️ How Our Frames Work
🧱 3D Printed Precision Frame
Each frame is 3D printed for a precise fit around standard U.S. banknotes (6.14" × 2.61"). An internal ridge helps keep the note properly positioned inside the frame.
🪟 Crystal Clear optically clear archival-quality polyester PET Windows
Each frame includes hand-cut optically clear archival-quality polyester PET on both sides, available in 4 mil, 7 mil, and 10 mil options. This clear polyester film allows full front-and-back visibility while helping reduce direct handling, dust exposure, and surface contact.
📎 Collector-Grade Mounting Tape
The Mylar is secured using archival-safe double-sided tape placed away from the note itself. The note does not come into contact with the adhesive.
🔩 Screw-Down Assembly
Each frame is secured with black-plated thread-rolling screws for a clean, durable, and reusable design. No glue, clips, or magnets are used in the frame assembly, and the frame can be reopened when needed.
🗄️ Modular Storage Systems
Our modular PETG storage systems expand the same collector-focused approach into coin capsules, graded slabs, bullion rounds, 1 oz bars, and other collectible storage needs. These systems are designed for practical organization, stackable storage, interchangeable drawers, and clean presentation.
⚠️ Why Material Choice Matters
Our frames use Mylar polyester film for clear visibility and a cleaner presentation. Unlike many soft “floating” style holders, the window material is rigid, clear, and designed for collector-focused display use.
✅ Built for Collectors
Serial Shield 3D™ products are built for collectors who want cleaner display, practical organization, reusable construction, and multiple storage options in one expanding product line.