My father recently gave me his MB 146. Its marked W.Germany on the clip ring, has a gray ink window and was purchased 1988-1990. He put it away inked and it sat for about 10 years. The piston was stuck when I got it and there are 3 hairline cracks that start at the blind cap trim and go up the barrel. I attached a photo with (2) of the cracks highlighted. The piston freed up easily after a soak, was flushed repeatedly and reinked. There are no signs of leaking.
I'm looking for some advice on what to do next. I'll be closely watching it to see if the cracks spread, but I intend to use this pen. Is this something that should be sent to FPH, Penboard, etc to have them repair the cracks? Or, sent to MB for a replacement barrel (would they use a matching vintage barrel?).
Thanks in advance for any comments or suggestions. Have a Happy New Year.