Greetings from Ukraine! The other day, my father and I bought 2 old machines for stitching soles, I'll attach link on photos from market below (sorry, idk how to attach them another way):
 
	1. Machine #1: https://www.olx.ua/d/uk/obyavlenie/shveynaya-mashina-gottwaldov-03028-p11-doppel-IDXfCc7.html
 
	
 
	
 
	
 
	2. Machine #2: https://www.olx.ua/d/uk/obyavlenie/shveynaya-mashina-due-fili-bj-65-doppel-IDXfBZT.html
 
	
 
	
 
	 
 
	These beasts are over 50 years old! The mechanism is working, but there is no instruction manual. We do not want to spoil the machines, we still have a lot of work for them!
 
	Perhaps someone can help us find instructions for their care and use? 
	I will be very grateful for any information