This one has me bugged. I have been doing a lot of searching to find which machine riutzelj actually has.
Could it be
https://picclick.ca/RARE-Swiss-made-...171294419.html or
https://picclick.fr/Vintage-TURISSA-...088965786.html
As Mickey2 has suggested that the ones he has seen seem to have bobbin cases like shown at
https://image.jimcdn.com/app/cms/ima...4377/image.jpg and are similar to the one Leon posted above.
According to
Turissa ultramatic it came with a manual. Does the machine in the manual and your machine look the same? I have gotten and seen too many machines that didn't match the manual or other bits and bobs that came with it. If the manual is actually for the green machine, does it show how to insert the bobbin? Does it have you insert it into a separate case similar to
https://www.ebay.com/itm/Sewing-mach...sAAMXQupJRFx2T or does it look like something else?
The Huskvarna-Viking site has some manuals for Turissa machines, but I don't think any of them are green.
Some manuals have part numbers in them. Pictures would sure help. I have not seen any free arm machines that take a long shuttle bobbin.
If
you or patricio rojas can''t seem to be able to post a picture, but do know how to email pictures, I would be happy to send my email address so that you could send them to me and I could reduce the size, if needed, and post for you.
Picture of the whole machine and the bobbin area would probably help a great deal. Also if you have a class 15 or 66 bobbin, have you tried them?
I did notice that some of the Turissa machines appear to take high shank feet.
Janey - Neat people never make the exciting discoveries I do.