That is an Elna SU62. It was my first real sewing machine back in the 70's for me. Had to take a loan out for it but it was worth it. Never saw the inside of the a repair shop and I can't remember ever oiling it or cleaning out the bobbin area but I must have. It traveled to 2 other states with me and I finally sold it when I purchased my Designer 1 machine as I thought I didn't need 2 machines. Boy was I wrong. Tried to buy it back from the lady I sold it to and she wouldn't even take double the money she paid me............obviously she fell in love with it too.
Sorry can't help you with the manual but I'm sure someone here can direct you to it. Its a great machine or at least mine was. I still miss it and tried to find another one online at Ebay but they obviously knew the value of the machine as they were asking a ransom for it. I declined to buy it.