The first Bread Box release sported cool Post Office-like graphics.
In time a similar paint scheme was used on the "unmarked" Treasure Hunt. The package no longer proclaimed "Treasure Hunt", instead a small circular branding identified it to the initiated.
Inspiration for the Bread Box came from the Jeep FJ-3 Fleetvan, a compact delivery van manufactured by Willys Motors and Kaiser-Jeep from 1961 to 1965. The FJ-3 was produced first as the right-hand-drive postal delivery vehicle seen below. The FJ-3A had an additional 19 inches of rear overhang.