This Rolex Datejust Ref. 16030 from 1980 with serial 573xxxx. This is a very special mode that was only available in the USA. To be recognized on the strap clasp. In addition, this watch has been issued to employees of IBM in very small numbers. Condition the be accepted in the IBM quarter centory club has been working for IBM for 25 years. The engraving on the caseback was originally made by Rolex and not subsequently made by a jeweler. Robert M. Werner (sounds German) has been awarded with this watch on May 31, 1980. Case condition is beautiful with very little signs of use. The jubilee band has the usual stretch for it's age but is still comfortable to wear. Best part is the dial which was silver/rhodium coloured originally. It tuned ito a tropical brown/bronze, original colour can be seen slighly close to the lume dots. Watch is delivered with box, chrono seal, booklet, additional bracelet segment and the hangtag with the serial. Original papers have been kept by IMB. Differential-taxation according to §25A UStG.