The Elna looks like a SU62. Elnas back then were totally made of metal innards so sturdy. Had mine for years and still kicking myself for selling it. Mine never saw the inside of a repair shop. I know Singers are well made too but I'm partial to the Elna because I had one so many years ago. The power foot doesn't look original on it though. The lid can be used as an extension table and it is also made of metal. You can also get cams that you place under that top lid to make more fancy stitches. The older Elnas were green and called grasshoppers. If you can get it for around $5 you got yourself a deal as I haven't been able to find one on Ebay for less than $250 and they don't look in as great a shape as that one does.
Just noticed a brown lid in the background. That's not the lid that goes with it. Should be a metal medium blue lid. Also noticed that one is not a free arm but a sit-in so maybe that is the lid.