@ckoei – good grief, Cecile, how did you find that? Yes that was it; I’d forgotten it was called a “Palmer Injector” and yes, that was the black box it came in. Attractive isn’t it? The date range they give of 1955-1965 is way off though! I wasn’t diagnosed until 1971 and my parents got mine brand new. And according to their profiles @mustard & @seasiderdave weren’t diagnosed until 1976 and 1979 respectively so they must have been available after 1965.
@seasiderdave – yes, blue was 0% – good – and orange was >2% – bad – with a ;