Does anyone know how to disassemble Montegrappa(piston or piston emulated filler) from a limited edition series?
This is MG La Traviata Sterling Silver.
The piston does not work(don't move by knob), probably a broken stem. The knob rotate is very easy. There is no access from the pen unit hole - there is a steel thin hole. I don't know how to remove the piston knob, there are no keyhole slots like on Pelikan/Aurora/TWSBI and there are no wedges like on Omas or vintage pens.
Anyone got any good ideas?