Postal Mechanisation

Machine Cancellations and Postmarks Produced in Great Britain During the Early Trial Period 1857-59
Tim Schofield
16 sheets

Experimental and Early Machine Postmarks of England 1857-1912
Jerry H. Miller
159 sheets (PDF only)

Boston Machine Cancels Used in Great Britain 1897-1907
Michael Mather
16 sheets

Postal Mechanisation
Steve McGill
112 sheets

Meter Franking: First Type Meter Marks
Mike Jackson
60 sheets (wide format)

Neopost Meter Mark Specimen Impressions (1927-59)
Jack Zhang
16 sheets

The New Modern Meter Mail
George King
16 sheets

Development of British Postage Printed on Site to 2011
Glenn Morgan
16 sheets