I like those old machines. They are easy to use and work horses. You don't
have to dis-engage the clutch to wind a bobbin but you sure better make sure you take the thread out of the needle. They are easy to clean - much like the clones. I did a tutorial on a 15 clone
http://www.quiltingboard.com/vintage...r-t169127.html - your machine has a stitch width selector and a stitch selector different - just be sure to not use a cutting oil on anything plastic - it may well be all metal anyway. Use heat if it is stuck. The bobbin should be very similar, too. If you get stuck get the free clone manual and you can see how to wind a bobbin, how to thread and how to care for the machine. If you turn the knobs make sure the needle is out of the hole. Take your time and you will really like that machine.