3508 x 1. XK150 Double Coil Washer ( Thackeray) for the space between the Clutch actuatuator arm and the bellhousing . A additional spring added to the XK150 clutch drop arm assembly. Often missing from vehicles, but is clearly listed for all XK150 in the Jaguar Parts Book. Original Number C1968

NOTE: This is only listed by Jaguar in the XK150 Parts book, but will fit all XK120 & XK140 models behind the drop arm to keep located and prevent dirt entering the bush.