Modifiche

For some time the two brands were produced together; the [[Mentmore]] was transformed into a joint stock company in [[1930]]. The situation at that time is not clear, there are those who reported that the brand [[Mentmore]] has been progressively replaced by [[Platignum]], but by the late '30s to the' 50s, there is a large production of pens with this brand . Also a patent of 1936 ({{Cite patent|GB|457212}}) explicitly shows the name of ''Spot Pen Company'' as the new name of ''Mentmore Manufacturing Company''. Association with [[Platignum]] brand is established at least until 1951.<ref>thanks to [[:File:1951-Platignum.jpg|this advertisement]].</ref>

For some time the two brands were produced together; the [[Mentmore]] was transformed into a joint stock company in [[1930]]. The situation at that time is not clear, there are those who reported that the brand [[Mentmore]] has been progressively replaced by [[Platignum]], but by the late '30s to the' 50s, there is a large production of pens with this brand with explicit reference in advertisements to the ''"Mentmore Manufacturing Company"''. Also a patent of 1936 ({{Cite patent|GB|457212}}) explicitly shows the name of ''"Spot Pen Company"'' as the new name of '''Mentmore Manufacturing Company"''. However the ''"Spot Pen"'' name appears in an advertisement for the ''British Industries Fair'' of 1929, while maintaining the reference to the company as ''"Mentmore Manufacturing Company"''. Association with [[Platignum]] brand is established at least until 1951.<ref>thanks to [[:File:1951-Platignum.jpg|this advertisement]].</ref>