Has anyone managed to disassemble a Vintage Kaweco Dia (i.e. NOT a Dia2)?
I have given a home to a Dia 805 that needs repairs, including a new piston seal and nib repair.
I guess the pen is from the 50s or early 60s.
So far I have tried soaking in water for a week (which fixed the non-fitting cap!)
but I cannot unscrew or pull out the nib/nib-holder.
I am also unsure how to take the piston mechanism apart to replace the seal.