My Great Grandfather Hugh Gault worked at Harland and Wolff at the time of Titanic construction. I have what appears to be a piece of steel that he passed on to my Grandmother, as a keepsake. The launch date is scratched into the steel. Not sure what this steel was used for.... but it looks like a plug of steel. (no I'm not joking)! By trade he was a iron worker, welder so perhaps these things were part of his supplies. Anyways, family lore says that he claimed that the Titanic would come to no good since they were required to work on Sundays to meet the launch date.