2017-2009 security machins ...

 my current study is 1/2p machin ... used material welcomed

 OFFER :  used
1st 2nd class security machins
post & go labels
Faststamp labels
regionals and FDC
country definitives
machin forgeries
machin perfins
60gm xmas - booklet

GB machin study is a longtime interest, began in 1967 ... I subscribe to Douglas Myall's : Deegam Handbook CD ...   in recent years, security printers have applied many techniques or layers to their products.  using the Shixin iCard camera and UV light sources...  I have expanded my collection vars greatly.