Thank you. I know the contents but I'd like to open them and see the outline. They should both be somekind of images. You guessed right kaseta was probaby for

Thank you. I know the contents but I'd like to open them and see the outline. They should both be somekind of images. You guessed right kaseta was probaby for a type recorder cassete inlay. Was doing some recording back then. Unfortunately can't find original software.