MK3........ sharp eyes! It’s the one that was on the bike when I started. Those parts include the front and rear fenders, bars, and lots of other bits. It’s a plastic chain guard with all the extra metal h’ware inside. I polished it up, heated and straightened it, and used it. My goal was to use either the NOS parts the previous owner had collected many years ago, or the original, refurbished parts.