A good used Laycock overdrive front casing assembly as fitted to the Jaguar MKVII & XK150 but was probably fitted to other British classics fitted with Laycock overdrives to but obviously check compatibility before committing to purchase.
The name plate on the housing shows a serial number of 28/1270 which would of been fitted to the MK7 MKVII
Might be of use if yours is damaged or you just want a spare just in case.