Up for sale is a Nettuno Superba from 1996. This was a limited edition pen and is no. 276 of 911. Beautiful green and bronze marbled celluloid with gold plated trim This pen has an unusual filling system. The pen works as a button filler, with a blind cap that allows access to the button filling system. If you open the pen up by unscrewing the barrel, you see that the filling system screws onto the back of the section. This can be removed in order to use a traditional converter. (Not included.) The button filling system works fine. Size is 5.25” closed and 6.25” posted. Pen is in excellent, near mint condition. 14K fine nib. Nice writer with no problems. Price is $525 shipped in USA; overseas at cost.