For sale is this really nice and clean, 18k solid yellow gold case Hamilton Automatic 21 Jewel wrist watch. The case measures almost 5/8" wide (measurement does not include the crown) and is solid 18k gold. The dial is clean, one extremely faint scratch on crystal and best of all the automatic movement is running strong and keeping perfect time. The back of the case alone weighs 3.4 grams and the the entire case, with movement and crystal intact weighs 15.8 grams. I am not able to remove the crown to remove the movement and crystal to get an exact gold weight.