Zeta

Lightburn was an Australian manufacturer of washing machines, wheel barrows, cement mixers, go-karts and cars. Car production commenced in 1963 and ceased in 1966 with about 300 Zeta saloons (marketed as a "second" car) and 48 Zeta sports being built.  Lightburn also assembled the 260 Sprint Alfa Romeo in Australia.

Zeta 
Size: 98mm x 33mm

(Zeta) Lightburn
From the radiator grill; "Zeta" was above on the car body
Size: 153mm x 27mm

The Zeta "second" car was a lightweight (fiberglass body), front wheel drive car that could feature as a family sedan, a station wagon and a delivery vehicle as all the seats (or combination of) could be easily removed and the Zeta had a flat floor space, the doors opened 180 degrees.
See the Lightburn blog for the maker.