10K Rolled Gold Plate. NOTE: The lever is on the LEFT side. This case is specifically made for Waltham Railroad grade movements like Vanguard or Crescent with lever on the left side, around 11 O’clock location. These cases with lever on the left side are very hard to find. There is lever cut on the case for lever set movements. NOTE: Although there is lever cut, the cut may not fit your movement. The crown can also be pulled up to accommodate Pendant Set movements. Case: Open Face, both covers screw on/off. Material: 10K Rolled Gold Plate. Please check the pictures carefully.