As the first update to my Knight Hospitaller I repainted the helmet with face mask.
I chose a type of white cross pattée because from several sources I've seen, it seem that it was the most common type of cross identifiable on the painted helmets.
The iconographic source for the red ochre paint scheme:
Fresco of Armed Hospitallers on horseback, Hospitaller Abbey of Santa Maria of Sigena, Catalonia, 1183-1200, SPAIN
The iconographic sources for the painted cross on the helm:
Manuscript miniature: Liber ad Honorem Augusti sive de rebus Siculis, 1194-1196, ITALY
Manuscript miniature: Codex Calixtinus, 1135-1139, Santiago de Compostela, SPAIN
Manuscript miniature: Hunterian Psalter, 1170, ENGLAND
The iconocraphic source for the helm with mask:
Manuscript miniature: "Codex du monastère San Pedro de Cadena", SPAIN, 1180-1185.
The helm unpainted, commissioned to an italian artisan and reenactor in 2010.