been laying around ,used! -genuine  amal pre monobloc jet block - 74 carb  , stamped   25 this is slightly different to the others listed  _ (look at the  2 holes and the flat face ! ,compared to the usual single round hole!) could be early model 74?    ,  to fit triumph  norton ajs matchless panther ariel  douglas sunbeam  bsa etc etc , fit amal  ,  74 ,   274   models etc etc , this is 50-60 years + old   -