Form 1908-A
Plate Registry
Vellum Reserve
Security Series
Proof No. 724
50
raised steel linework rose engine turnings microprint border cotton rag substrate anti counterfeit field
50

Certificate of mechanical trust

Authority
in Every Line

Security-green engraving, microprinted rules, and aged olive rag stock make precision feel earned rather than declared.

INTraised ink
GCHengine grid
RAGtoned field
verified by ruled borders engraved capitals interlaced currency geometry no flat field left unexamined
This is the Banknote Guilloché design system, applied by Curio Design — a design-style library for AI agents. Full Banknote Guilloché guide → designbycurio.com/learn/banknote-intaglio-guilloche