removed the serif from the numeral '1' and also altered the '4', in both cases reverting them to their original appearance. New Johnston's numerals are originally designed to fit for setting tabular matters, which was requested by TfL. As a proprietary typeface (one of the first ever), Johnston did not become commercially available in metal type. However, capitalising on the popularity of the design style after Gill Sans had become popular, the typefounders Stephenson Blake, who cast the Johnston metal type, created a similar but not identical design, Granby for sale. According to Mike Ashworth of Transport for London, London Transport itself made some use of Granby by the 1960s due to the limited availability of Johnston metal type. It also used Gill Sans for printed ephemera, such as timetables. Johnston Delf Smith This variant was commissioned by Frank Pick as a wedge-serif variation of the organisation's standard sans-serif Johnston face and was designed by Percy Delf Smith, a former pupil of Edward Johnston; Johnston had considered a wedge-serif design during the early stages of the commission. The typeface was originally used for the headquarters building at 55 Broadway, SW1, It can only be seen on some signs at Sudbury Town on the Piccadilly line. In early 2007, a digitisation of the typeface was developed by Transport for London under the name Johnston Delf Smith for its own use on historic signs. It remains the property of TfL. Designer Matthieu Cortat has released an unrelated implementation of the design commercially, under the name Petit Serif. Johnston 100 A new version, known as Johnston 100, was commissioned by Transport for London from Monotype in 2016 to commemorate the 100th anniversary of the introduction of the typeface. It includes two new weights, 'Hairline' and 'Thin', for digital use, as well as symbols such as the hash character #. Several characters have been changed, such as the restoration of the diagonal bowl on the lowercase 'g' which was lost in New Johnston. The font is designed to reflect Johnston's original intentions, and to be closer to the original version of the Johnston typeface. Non-TfL Digitisations Several digitisations of the Johnston type exist. ITC Johnston International Typeface Corporation released a variant in 1999 called ITC Johnston. It originally included three font weights like New Johnston, however it does not include the hooked 1 and uses side-pointed 4. In November 2002, the typeface was rereleased