This is a very rare special vintage cube made for Heureka in year 1989, only 100 numbered pieces and this cube is numbered 28/100.
Design by famous professor Oiva Toikka and hand made in legendary Nuutajärvi glass village in Finland.
Signature: Oiva Toikka Nuutajärvi 28/100
Heureka 1989
Condition: Very good (some normal scratches due to age)