Model:-A7 (approx. L:127mm, W:10mm, 6rings), size reference A7-01 ##this backplate is difference then other size, please see the picture -A7 (approx.
Binders in Binders & Accessories
Krause Book Binder
A5 Binder Mechanism
Ring 35mm - Australia
Binder Mechanism A5 - UK
Personal/Medium Krause Ring Mechanism
Krause Ring Binder – Crimson Hides
Marcelo Metais, São Paulo SP
Szirmai, John - The Archaeology of Medieval Bookbinding