The Energon Pub

hi all

im sure in my parents loft ive got a transformer that ive never seen any where else. i bought it in germany around 1987, and its a walkman robot - from memory measures around 4 inches by 6 inches, about one inch thick. i believe its orange and yellow, and the when in walkman state the front front open as if for a cassette, although obviously a standard cassette is way to small. transforms into a large robot which probably stands higher than optimus prime. cant for the life of me remember whether its autobot or decepticon. any one any ideas?

and it's not Blaster?