272D: Hero has to choose the true object from a room full of copies

A black and white illustrated children’s book that I read in the 80’s. At one point the hero has to chose the real object hidden amongst a bunch of duplicates. The object may have been a small knight or castle figurine. The hero solves the riddle by asking the various craftsmen who made the copies which one they think is best. The one left over is the true object.  The craftsmen or makers may have been dwarves or some other type of fantasy creature like an elf.

I recall it being a fantasy type setting, possibly medieval and probably had a typical Hero’s Journey type structure to it. The illustrations seemed to be cross hatched or stippled and I’m pretty sure they were in black and white only. The illustrations were large enough to make me think this was a picture book. The book was probably a hardcover and likely in a landscape format.

 

Hope you can help!