Modifiche

* [https://web.archive.org/web/20120314000506/http://www.kamakurapens.com/Paul_Wirt/Paul_Wirt_Company_History.html] Story of Paul Wirt, from the dismissed site of Kamakura Pens.

* [https://web.archive.org/web/20120314000506/http://www.kamakurapens.com/Paul_Wirt/Paul_Wirt_Company_History.html] Story of Paul Wirt, from the dismissed site of Kamakura Pens.

* [https://web.archive.org/web/20081227221509/http://www.penbid.com/Auction/showarticle.asp?art_id=105] Article on Wirt on the dismissed site of PenBid.

* [https://web.archive.org/web/20081227221509/http://www.penbid.com/Auction/showarticle.asp?art_id=105] Article on Wirt on the dismissed site of PenBid.

[https://web.archive.org/web/20100206193921/http://www.wirtpens.com/] Site dismissed, the archived version is in black on black.

* [https://web.archive.org/web/20100206193921/http://www.wirtpens.com/] Site dismissed, the archived version is in black on black.

[https://web.archive.org/web/20140104041841/http://paulwirt.com/] Dismissed site on the company.

* [https://web.archive.org/web/20140104041841/http://paulwirt.com/] Dismissed site on the company.

* [https://web.archive.org/web/20120304230247/http://www.kamakurapens.com/WirtCollectionIndex.html] Section dedicated to the company on the dismissed site of Kamakura Pens.

* [https://web.archive.org/web/20120304230247/http://www.kamakurapens.com/WirtCollectionIndex.html] Section dedicated to the company on the dismissed site of Kamakura Pens.

* [https://web.archive.org/web/20120712004410/http://www.pensandwatches.com:80/_pages/pen_company_photos/paul_wirt_fountain_pens.htm] Page on the Pen & Watch dismissed site.

* [https://web.archive.org/web/20120712004410/http://www.pensandwatches.com:80/_pages/pen_company_photos/paul_wirt_fountain_pens.htm] Page on the Pen & Watch dismissed site.