Top row:left to right, U-683, U-805. Bottom row: U-866. The U-866 is the largest of these chunky uniparts made by JD I have in my collection. I was forced to sell or trade the larger ones to make space for other pieces. Occasionally, I can muster up some discipline in my collecting. With that said, I will be looking for just about anything interesting in pin type North American porcelain at Springfield, at the end of the week, no discipline while there!