A rapier, manufactured in the century by the technology of the old masters as a gift to one high-ranking person. Such exceptionally flexible rapiers were made in Toledo in the beginning of century. They were sold in gun shops and coiled.
So, the Master Sword has been around for a while, and in each game it looks slightly different (except I guess from TP to SS). But I feel, after playing around with different replicas, like the sword is a bit too bulky and awkward looking.