FED-50 - request for help.

Hello
I need advice or istructions to repair the shutter of my FED-50 (blades are stuck after a long period of inactivity - I can open them by probing with a needle, but after they remain stuck again). Practical advice, tutorials, links, repair instructions concerning this beautiful camera will be most welcome.
Thank you in advance
Joao
PS: My apologies if this is not the right forum for this topic (moderators please feel free to remove the message if this is so).

Hello Joao
The easiest way to put your Fed into operation is to spray or inject Lighter fuel (after complete lens removal)and let it evaporate.
With a cotton swab remove the excess. sometimes this operation must be repeated twice in order to complete a reliable duty
Best regards from Brazil.
and permanent congratulations for your excellent photos on Zenit forum
LP