Some cars leave a paper trail; the Lotus 33 left a name and a place in Lotus's list. What follows is what can be said with a source behind it. Colin Chapman / Len Terry drew it.
Where it came from
The Lotus 33 was a Formula One car designed by Colin Chapman and Len Terry and built by Team Lotus. A development of the successful Lotus 25, in the hands of Jim Clark it won five World Championship Grands Prix in 1965, taking Clark to his second World Championship.
In context
Its family tree is legible: it took over from the Lotus 25; its successor was the Lotus 43. Nearby in the Lotus catalogue sit the Lotus 100T and the Lotus 101.