Interesting little item , OLDZ06 .
Perhaps you might consider filling your mold with "play-dough" , in order to get a good pic - for prospective buyers (& just for fun/your own info) of the 'postive' image of what's in the mold ?
It looks like a nice example of an YW mold set ; could make cakes & other do-dads for many purposes (Easter , Christmas , Silence o' the lambs party , etc .) .