>>4204705This is Svema FN64 (aka Foto 64), and 64 is actually the ASA/ISO value. What's the Develop Before date of yours (the "IV-1994" in this pic i grabbed from ebay)? If it's not like early 80's then I'd just start with ISO 50, develop according to devchart below (or stand in 1+100, as usual), and adjust from there. Have fun, it may be very rewarding. (Or just sell it to lomo retards for $10 a roll on egay and buy something fresh instead. Or just send them to me lmao).
https://www.digitaltruth.com/devchart.php?Film=Svema+Foto+65&Developer=&mdc=Search&obs=Y