Happy New Year everyone! There is a Masterpiece 644G up for sale around here, and I'm really thinking about it. The nib is EF and it looks nice, but the piston leaks at the top when its going down. Otherwise it moves smoothly and the pen takes up ink as it should. So as it seems now, the cork seal needs to be replaced. http://www.kepfeltoltes.hu/131231/5dd6_1_big_www.kepfeltoltes.hu_.jpg http://www.kepfeltoltes.hu/131231/5dd6_5_big_www.kepfeltoltes.hu_.jpg http://www.kepfeltoltes.hu/131231/5dd6_6_big_www.kepfeltoltes.hu_.jpg http://www.kepfeltoltes.hu/131231/5dd6_7_big_www.kepfeltoltes.hu_.jpg