Black Imperial body with one white cotton string and two glass crystals embedded in the center face of each halve: one red and one light gold.
The model in this exhibit was the first plastic version of the Duncan Jewel that featured "genuine glass crystal" for the two jewels. It debuted in 1976-1977.
Side A stamp in gold:
"Duncan
[red glass crystal, embedded]
Jewel"
Side B stamp in gold:
"Duncan
[light gold glass crystal, embedded]
Jewel"
