From week 02/97 onwards the option code is printed on the typesticker. Always use this code !
For early sets without this information on the typesticker, the option code is: 00972
Since production week 9741 a new VPS IC pos. 7840 (SDA5642-6) is introduced in production.
This IC is not compatible with the previous one. When ordering, look at the printing on the IC !
Old: SDA 5642-5 - codenumber 4822 209 32728
New: SDA 5642-6 -