Had to do some repair on my Stb freewave 2017. Do you have the RAL or NCS code on the orange bottom?
Actually Fanatic has this on this website.
you can check the archive (on the menu click on BOARDS and to the left there will be Archive, then you can go down to your board. and I would assume it is the TE:
877 C (grey)
804 C (orange)