Renwal was the earlier company.
Ahh renwal thats the one , Zoltar I have a mold of the motor coil if you want one save buying the whole kit, send me an SAE and you can have one for nowt)
I think this part is only on the pre 1977 kits as well.
I've heard of this kit being used for parts, but what props/models exactly are the parts used for?