西華拉桿上墨專利紀念限量筆

W.A. Sheaffer Commemorative Limited Edition

筆款:西華拉桿上墨專利紀念限量筆,限量6000支,1996年發行

筆尖:18K雙色M尖

上墨:拉桿上墨

筆身材質:黃銅鍍鎳+23K鍍金

品相:內外盒單齊全未使用

說明:Walter A. Sheaffer於1908年首次註冊拉桿上墨(Lever-filling)專利,專利文件的繪圖說明即印製在收藏木盒之上。雖然1908年專利的拉桿上墨機構只是雛形未能量產,但在改良設計後,W.A. Sheaffer再次於1912年註冊新款拉桿上墨專利成功,並於1913年成立W.A. Sheaffer Pen Company,開始銷售西華鋼筆。西華的拉桿上墨鋼筆,沒有Conklin月牙上墨(Crescent-filling)筆身不平整的情況,也沒有Parker按鈕上墨(Button-filling)需先卸下尾蓋才能上墨、以及尾蓋常因此搞丟的問題,拉桿上墨於1920年代幾乎統一了英美鋼筆的上墨方式,也讓西華名列當年北美四大筆廠之一。現代西華所發行的諸多限量版與特別版鋼筆當中,最具意義的即是這款拉桿上墨專利紀念筆。

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