The box shown here is for the Tri-ang, Spot-On #212 Car, Dinghy & Trailer Set models.
It is a 'window' box complete with the inner card 'plinth' section.
The Set contains models #165 Vauxhall Cresta (PA) and #135 G.P. Dinghy on Trailer.
All colour variations of both models were originally supplied in the same box.