In describing David's conquest of Rabbah in 1 Chronicles 20:2, it says that after Joab and the army laid waste to the city, they put the Ammonite king's crown on David head. It also says the crown's weight was a talent, or 75 pounds. Why would a king have a crown weighing 75 pounds?! Have you heard of other ancient cultures whose kings wore crowns of like weight for purely ceremonial reasons? Could this be a transcribing error that has come down through the centuries? Or do you think the referenced verse should be read as a corollary to verses 5, 6, and 8 of the same chapter: the king was  giant like the others mentioned who were "descended from Rapha" (v.6)? -- David.

Does the following website help you?

http://www.ccel.org/ccel/smith_w/bibledict.html?term=Crown