I put the pen body to warm (35 C) water cup for melting sticky ink inside cylinder chamber. The piston was stucked so I put some tension from main screw and then the cell ring.....
After a 15 minutes (heating was on all the time ) I remember my pen. Water wasn't boiling, maybe 65-75 C but the body of my pen looked like a twisted banana!
To get out the piston and piston shaft from banana body I managed to break them too ( where was my brains?)
Let me be the one and only stupid who handle vintage pens that way.
If anyone have spares, new body,piston shaft and piston I am interested. See my ad. on Buy chapter.
Welcome to the wonderful world of FP repair. Like I said in the beginning of my FP DVD's, It's not if, but when you break a pen. I had a beautiful Yellow Celluloid Fords flat top disintegrate in my lands last month. I was buffing it and rather than go lengthwise along the barrel, I wrapped it with my buffing sheet and applied a twisting motion to get at a nasty scratch, the twist cause it to quite literally crumble into a couple of dozen pieces. Needless to say the profanity flew that afternoon!
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Tu ne cede malis sed contra audentior ito ~Yield not to misfortunes, but advance all the more boldly against them
I fortunately never destroyed an expensive one. But in the meantime, I US cleaned a Pelinkan New Classic gold plated nib (it is not plated anymore...), I left an ink stained casein CS submerged in water (now I have a wonderful section assembly...), and other things I don't remember
Curse for a while and take this as part of your steep learning curve!!
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Don't quarrel with a stupid guy, people might not notice the difference.