I do like a shaken Dry Martini! Sorry, I should say Bradford. For some a "shaken martini" is blasphemous but the aeration generated by the more vigorous...
I’d be interested to know where you heard “do not add any bitters at all”? I’ve added the recipe for the first known reference to a Bradford above and a link to our Martini history page which has a pic of the 1900 recipe calling for orange bitters.