With subvariants that were made untill the end of 2007 in South Africa.

The '20' suffix means that it is a commercial model or a 'truck' while the '10' suffix is used for passenger models, so the B110 was made from 1970 untill 1973 [even longer in South Africa] while the B120 was made for MUCH longer, at least untill 1994 in Japan.

The B210 was made from 1974 untill '77, but it wasn't made at all in South Africa, which is why the 1200 had such a long production run there,

There was no such thing as a B220 or a B320

A cat converter was a legal requirement on all passenger models that were manufactured from 1/1/1986 here in Australia.
Commercial models did not require them for another few years.