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For some time the two brands were produced together, the [[Mentmore]] was transformed into a joint stock company in [[1930]]. It is not clear the situation at that time, there are those who reported that the [[Mentmore]] brand has been progressively replaced by ''Platignum'', but by the late '30s to the '50s, there is still a large production of pens with this brand. Association with [[Mentmore]] 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]]. It is not clear the situation at that time, there are those who reported that the [[Mentmore]] brand has been progressively replaced by ''Platignum'', but by the late '30s to the '50s, there is still a large production of pens with this brand. Association with [[Mentmore]] is established at least until 1951.<ref>thanks to [[:File:1951-Platignum.jpg|this advertisement]].</ref>

During the war the pens production was reduced to meet the needs of the war effort. It is reported that the company produced pens for spies with maps and compasses or with poisonous darts. The production resumed after the war also with the creation of ballpoint pens. The evolution of the brand is uncertain as well as relations with the parent company. And today both [[Mentmore]] and ''Platignum'' exist as independent brands.

During the war the pens production was reduced to meet the needs of the war effort. It is reported that the company produced pens for spies with maps and compasses or with poisonous darts. The production resumed after the war also with the creation of ballpoint pens. The evolution of the brand is uncertain as well as relations with the parent company. And today both [[Mentmore]] and [[Platignum]] exist as independent brands.

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