175 years of Swiss Federal Stamps
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/175%20years%20of%20swiss%20federal%20stamps.pdf#zoom=95

75 years of GB stamps by photogravure
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/75%20years%20of%20gb%20stamps%20by%20photogravure.pdf#zoom=95

Briefmarken Switzerland 1850 1979
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/briefmarken%20switzerland%201850%201979.pdf#zoom=95

Briefmarken Switzerland 2002 2010
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/briefmarken%20switzerland%202002%202010.pdf#zoom=95

Briefmarken Switzerland 2011 2017
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/briefmarken%20switzerland%202011%202017.pdf#zoom=95

Briefmarken Switzerland 2018 2023
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/briefmarken%20switzerland%202018%202023.pdf

Dummy News and Views 05 2006
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/dummy%20news%20and%20views%2005%202006.pdf#zoom=95

Dummy stamps issues 1-25 Glenn Morgan
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/dummy%20stamps%20issues%201-25%20glenn%20morgan.pdf#zoom=95

Gravure Cylinders parts 1-3
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/gravure%20cylinders%20parts%201-3.pdf#zoom=95

Methods of Stamp Printing
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/methods%20of%20stamp%20printing.pdf#zoom=95

One hundred years of Swiss Railways
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/one%20hundred%20years%20of%20swiss%20railways.pdf#zoom=95

Royal Household Mail Glenn H Morgan 1992 2012
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/royal%20household%20mail%20glenn%20h%20morgan%201992%202012.pdf#zoom=95

Swiss Trial Prints Derrick M Slate
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/swiss%20trial%20prints%20derrick%20m%20slate.pdf#zoom=95

Switzerland 1862 1883 The Perforated Sitting Helvetia
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/switzerland%201862%201883%20the%20perforated%20sitting%20helvetia.pdf#zoom=95

Switzerland a Panorama of Its Stamps
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/switzerland%20a%20panorama%20of%20its%20stamps.pdf#zoom=95

Switzerland Air Mail 1913
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/switzerland%20air%20mail%201913.pdf#zoom=95

The Courvoisier « Paul Usteri » design trial by Helmut Büchel
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/the%20courvoisier%20paul%20usteri%20design%20trial%20helmut%20buechel.pdf#zoom=95

The Postage Stamps of Switzerland 1843 1862 P Mirabaud
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/the%20postage%20stamps%20of%20switzerland%201843%201862%20mirabaud.pdf#zoom=95

The Swiss Soldiers Stamps
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/the%20swiss%20soldiers%20stamps.pdf#zoom=95

Wifag Probedruck 1945
https://www.polysenior.ch/polysenior/pagesdecouverte/wifag%20and%20stamp/wifag%20probedruck%201945.pdf#zoom=95

Voir aussi

Stamp printing press Winkler & Fallert
https://www.polysenior.ch/polysenior/pagesdecouverte/stamp%20printing%20presse%20wifag.pdf#zoom=95

Quelques timbres-poste en relation avec les métiers actuels ou anciens ou approchants de Polytype / Wifag
https://www.polysenior.ch/polysenior/stamp.html

The history of print
https://www.polysenior.ch/polysenior/pagesdecouverte/the%20history%20of%20print.html