A ULCC/VLCC, probably Esso Europa lost an anchor in Aruba around 70/80. Anyone has more?

Between 1970/80, a ULCC/VLCC lost an anchor and chain while setting anchor, just south of Aruba. It was a Esso German tanker and the anchor was manufactured by a German foundry, the Deutch Bundes Patent (DBP). We are not sure if it belonged to the Esso Europa and the exact date it was lost..The anchor is now a monument and tourist attraction and we are writing a story on it. Numbers on the anchor are: 4112; 4115; 21772K. It also has the letter "H", meaning the Hoesch Dortmund Horde Company. We have meanings on the numbers.