Ah, you have a model 62C without an automatic buttonholer. You have made a brilliant purchase of a machine that walks on water. Congratulations.
The model number and other technical info are on a plate under the hand wheel, on/off switch, etc. on the right side of the machine (as you face it.) To find original manuals for this machine get online and search for Elna Super
62C. If I remember the manual well enough, the information and instructions cover both the 62C that does not do automatic buttonholes as well as the 62C that does. Oh, and the "manual" comes in two books: one is red and the other is white.
I got into all of this when my much beloved automatic buttonhole making 62C needed the entire cam shaft replaced. The weeping and wailing would have caused the entire sewing community around my house to being food and sympathy. It was so bad that my daughter wiped my eyes, held the tissue while I blew my nose, and gave me her 62C with automatic buttonholes to keep forever and ever. I am still looking for a replacement cam shaft. Elna has gone through some vicissitudes and I find that they do not support this model. That means I am looking in sewing machine fix-it shops, online, etc. for a machine I can use for parts. And if anyone out there has a 62C that does automatic buttonholes and would like to sell it, I am interested. My preference is a parts machine. Anyway, forgive me, I digressed.
That version Elna, whether or not it makes automatic buttonholes, is marvelous. Mine went on tour with a drum corps for several years. It dressed my children. It repaired the tonneau cover for my husband's sports car and the covers for a couple of boats. It made clothes for my husband. It made clothes for me. It made all the draperies for our home. Sheets, alterations, you name it. I literally wore the paint off the machine. When I find the replacement part, I am going to be one of the happier women in the world. And I am going to find it. The machine has my feel to it and I want it back. The Bernina, etc. machines that I have been limping along with since my Elna died, will become back ups.
The way you tell the difference between the two machines is that yours has a stitch width knob that is oblong. The automatic buttonholer knob is square. Ta da.
Once more, you will love your new/old Elna. It does everything and more. I simply cannot say enough good about it. It is the last manual machine Elna made, as far as I know.
If I can help, please email me.
Pat