Pegasus is definite match to the catalogue in the Zoo. I watched the auction to see how many Zoo members spotted it :-)
Pirelli called these dogs, Standing Scotties. sizes Small and Medium. At some point they must have added Large too, There are also a versions with; short snout, sitting, short tail, long tail, and bulging belly. Must have been their best selling line. Perhaps we will find out more when the article by an ex-Pirelli worker is added to the Zoo.