Hi All, today I´ve got an old Manus Austria BCHR pen. I´ve googled a little bit and found 2 old threads here with the question how to open such a pen but no answer. I hope somebody can help me and knows how to open such a pen for repair. The pen is 90 to 100 years old (1910 - 1920). Despite some people think it´s a twist filler I´m pretty sure that it´s a piston filler. The piston knob is turning and it seems that a piston is moving up and down internally. The hard rubber is in very good condition, the chasing is crisp and there is no sign of discoloration. http://imageshack.us/a/img837/7351/66no.jpg On the barrel it has the imprint Manos Austria. http://imageshack.us/a/img593/3442/zr4a.jpg The feed is quite archaic. http://imageshack.us/a/img690/5066/lwy9.jpg The Nib has a star on it and the incription 14k gold plated made in Austria. http://imageshack.us/a/img593/3971/uiow.jpg Overall it looks quite nice, nothing special but nice. The only question is how to open up the pen to repair it. The section and the barrel seems to be seemless. http://imageshack.us/a/img607/4305/9k69.jpg It would be great if anyone knows how to open it.