Another one for the record
A May 1959 advert from Lightalloys Limited noting that it supplied many parts for these North British built diesel hydraulic locos (D600 pictured). They were cast in their Alpax light alloy and included the cabs and doors.
This advert appears in the following categories: Traction: Class 41 ; Supplier: Lightalloys Limited ; Component: Alloy Castings/Metals