We don't suggest that you create a new radio with these little radio crystals, but we see all kinds of possibilities with them.
These are vintage and measure about 3/4 to 1 inch long (including the legs) and 3/8 inch wide. We thought they'd be cute for making little dolls with robot heads, some steampunk jewelry or some other unique project.
Two crystals are shown to illustrate front and back. Numbers may differ on each transistor.
Please do not use these for electronics, they are for novelty use only.