I mentioned in an earlier blog post some of the very early features of FC316. Here are some photos of the stop lamps. the right hand unit is the prototype. As you can see the metal lug at the bottom is traight rather than slightly inverted like in the left hand "regular" unit. In the second photo you can see differences in the unit pressing (again the "regular" unit is on the left), whilst the last photo shows the "regular" unit on the left with the Lucas branding and part numbers whilst the "prototype" unit has no markings at all apart from a crudely stamped L672 behind the lamp reflector.

The other interesting item is the boot lid frame. The parts catalogue I have show these were amended sometime before February 1963 by adding a central strengthener. The photo on the left shows the "regular" strengthener the right hand photo shows the frame from FC316 without the added central stengthener.