Counting the demonstrator 8033D would be 101...
8033D - 8131D = 99
8138K, 8888D = 2
99 + 2 = 101
Q5... Hmm I forgot if B9TLs were Euro III or IV, if it is then
the first such bus would be 7300P lor.
B9TLs are Euro III. SBS2888T is dunno Euro I or Euro II. if
B9TLs are Euro III, then the newer buses after the B9s are K230s,
which are the first Euro IVs. but since SBS8033D is a demonstrator,
it'll be registered first, therefore, the first.