Couldn’t find any info about the “The King” that you posted .
Nevertheless, there is some ( scarse ) info about the brand :
http://www.fountainpen.it/index.php?title=The_King/en&mobileaction=toggle_view_mobile
http://www.fountainpen.it/Radius
I came across this beautiful The King model Superior in caramel celluloid ( site owner is Letizia Iacopini ) :
https://www.tenpen.it/product/king-superior-caramel-celluloid
also of note, this Astura ( italian brand I believe ) in a beautiful blue and gold (veined) celluloid, box is not original (scroll down to see more pics of the Astura ).
https://en.todocoleccion.net/old-fountain-pens/preciosa-pluma-safis-astura-nova-marmolado-azul-oro-blue-pearl~x123894159#sobre_el_lote
PS : for some reason, pics of the two first links show up in blank in my tablet, however when I click on the blanks, pics show up .
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www.newpentrace.net