Thank you for your quick reply.
I think the number is valid, because the number looks untouched and i find similar VIN's with google for the supra mk3 (just with higher number at the end which indicates mine is older).
I do know it has been imported from germany to the netherlands in 1996, but i think it should not matter.
Also i can find spare parts for it.
http://www.toyodiy.com/parts/q?vin=JT1LBMA7000048028