A used SU H4 Carburettor body AUC7040, there is some engraving just below the part ID but it's almost unreadable and I think it refers to the configuration of the body or carb spec.

Not exactly sure what this has come off but I guess if you are looking you know.

H4 1 1/2"

It's 'as found' so will know doubt need new seals etc. and a good ultrasonic clean before use.