Modifiche

Riga 55: Riga 55:     
== Riferimenti esterni ==
 
== Riferimenti esterni ==
* http://www.penhero.com/PenGallery/Sheaffer/SheafferTouchdownEarly.htm
+
* [http://www.penhero.com/PenGallery/Sheaffer/SheafferTouchdownEarly.htm] Pagina dedicate alle prime Touchdown su Penhero
* http://www.vintagepens.com/Sheaffer_Touchdown_Snorkel.shtml
+
* [http://www.vintagepens.com/Sheaffer_Touchdown_Snorkel.shtml] Pagina sul sito di David Nishimura su Touchdown e [[Snorkel Pen]]
* http://www.penhero.com/PenGallery/Sheaffer/SheafferTouchdownGuide.htm
+
* [http://www.penhero.com/PenGallery/Sheaffer/SheafferTouchdownGuide.htm] Pagina dedicata al sistema di caricamento [[Touch Down]] su Penhero
* http://www.rickconner.net/penspotters/sheaffer.snorkel.html
+
* [https://web.archive.org/web/20160401110127/http://www.rickconner.net/penspotters/sheaffer.snorkel.html] Pagina sul sito dismesso di Penspotters su TM Snorkels e predecessori
    
== Note ==
 
== Note ==
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