"HUMBER HAWK LUCAS PLC6 IGNITION LIGHT SWITCH BRISTOL SUNBEAM TALBOT JENSEN SNIPE"
"Very rare Lucas PLC6 ignition/light switch from a Humber Hawk but please double check exact fitment - marked with Lucas part number 34073 and dated 1954."
**************** NOW SOLD **************
This isn't unobtanium but it is gold-dust. The correct profile knob (truncated "witches-hat" I call it) is quite hard to locate and this one is nicely cleaned.
https://www.ebay.co.uk/itm/HUMBER-HAWK- ... %7Ciid%3A1
eBay item number:273729307167
Buy-it-now at £99.99