The Leonard Bernstein writing instruments were produced about 1999 to 2001, the Yehudi Menuhin pieces 2001 to 2003; official quantities are not known. The Bach fountain pen appeared in February 2001, was planned to 12,000 pieces, the ballpoint to 8,000. Unlike the other Donation Pens, the Bach models bore an individual edition number on the cap. The stated final figures were however not quite reached, since the pieces delivered at the start did not yet receive an engraving and the production ended at the availability of the clips; in total significantly less than 20,000 Bach writing instruments were made.