Modifiche

{{CronoModello|Laidtone Duofold{{!}}{{!}}Duovac}}

{{CronoModello|Laidtone Duofold{{!}}{{!}}Duovac}}

== Riferimenti esterni ==

== Riferimenti esterni ==

* http://www.richardspens.com/ref/strduo_profile.htm

* [http://www.richardspens.com/ref/profiles/strduo.htm] Profilo sul sito di Richard Binder

* http://www.rickconner.net/penoply/park.02.html

* [https://web.archive.org/web/20160427211020/http://rickconner.net/penoply/park.02.html] Pagina su Penoply

* http://parkerpens.net/duovac.html

* [http://parkerpens.net/duovac.html] Pagina sul modello su ParkerCollectors

== Note ==

== Note ==

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