Yes, in the early 18th century a lot of ships from The Dutch East India Company sailed the oceans. Many ships sank or got lost. The ship from this story is a real ship and most materials used in the puzzles are copies from original pieces found in archives.
Because it's a wooden box with a bottle (all necessary for the treasure hunt) it weighs more then 1 kg. But to make it easier for you to choose to back this project. I lowered the shipping costs and I will pay the remaining costs for shipping.