isn't the chassis "6K"
the mk3 ibiza is "6K2"

both 6K in principle as seat regard the mk3 more as a facelift because the platform hadn't altered design but the 6K2 seems to be widely adopted and useful to seperate the two

>>> 6K_X_399999 is the last mk2 /// 6K_X_400000 >>> for mk3

for the anoraks the factory dates mk2 last run was 30.06.99 & mk3 started 01.03.1999 so a few months crossover