DBS 6 / AM Vantage 6 cylinder 1967 to 1973, thermostat housing elbow as original, with the lug for for the vacuum valve, part number 069-006-0101 which is what you are buying.

without the locating bracket for the vacuum controlled heater valve for later cars with manual heater valve, part number 069-006-0004. please enquire

New one in has the small hole in the lug on the photo, original unused pattern does not.