You are purchasing a NOS (New Old Stock) factory water pump outlet spout for the Jaguar V12 XJ12 XJS.
Please see the 3rd photo, this opening for the thermo switch is for a push in switch not the threaded one.
New from a vintage British inventory, part number C38001 and that number is on the part.
Photos are the actual part.
Please see our auctions and ebay store for more NOS new and one of a kind parts.
Thanks.