Pic/article of the Gye & Moncrieff fastner as found in "Modern Sportsman's Gun and Rifle"(1882):(select page 200)

http://books.google.com/books?id=8CMLAAA...%20&f=false
http://books.google.com/books?id=OLwUAAA...eet&f=false

Some info from another Gye & Moncrieff post. They didn't make their examples but like many other retailers sourced their examples from others.

Kind Regards,

Raimey
rse