Iron concretion in the form of a bite or a large nail from the wreck of the East Indies' t Vliegend Hart; which died in 1735. Fragments concretions; two of which have been filled with silicone rubber for preservation; and of which has perished due to corrosion. Two fragments showed no clues for a recognizable object and were thrown away. Concretion; Dutch East India Company; 't Vliegend Hart (ship); 1700 - 1735; rubber (material); l 7.5 cm x w 2.5 cm x d 1 cm