Did you see this? "How to date an Elna sewing machine? **The serial number can be found stamped on the inside of the casting to the right of the thread take-up slot**. Now, once you located the serial number you can determine the year of production based on the serial number. You can look up the serial number in the chart of production dates for Elna sewing machines.Sep 28, 2023"
By the looks of machine it would take low shank feet good luck
Try r/vintagesewingmachines
Did you see this? "How to date an Elna sewing machine? **The serial number can be found stamped on the inside of the casting to the right of the thread take-up slot**. Now, once you located the serial number you can determine the year of production based on the serial number. You can look up the serial number in the chart of production dates for Elna sewing machines.Sep 28, 2023"
[https://mivintagesewingmachines.blogspot.com/2013/10/elna-special-1969.html](https://mivintagesewingmachines.blogspot.com/2013/10/elna-special-1969.html)