Riga 112:
Riga 112:
** Neptune Pen; Burge, Warren & Ridgley; 91&92, Great Saffron Hill, London
** Neptune Pen; Burge, Warren & Ridgley; 91&92, Great Saffron Hill, London
* 1918
* 1918
−
** John Whytwarth Scientific Unleakable; John Whytwarth Ltd.; 14, Ivy Lane, Paternoster Row, London
+
** John [[Whytwarth]] Scientific Unleakable; John [[Whytwarth]] Ltd.; 14, Ivy Lane, Paternoster Row, London
* 1919
* 1919
** Jewel pen; [[Jewel Pen Co.]]; 76, Newgate Street, London
** Jewel pen; [[Jewel Pen Co.]]; 76, Newgate Street, London