@tty the braces have both poly ropes that look like hemp as well as steel wire. Many of the sheets switch to wire at the yard and then to chains for the turtle blocks, as do the halyards at the gin blocks before they pass over a sheave through the mast.
@th Amazing -- thank you for the response & photo! Are the braces made of steel? What fibres are the other lines made of? What IS this beautiful ship? :D