WW1 French USA Post Home Helmet To Phoenix, Arizona

Interesting M15 French Adrian helmet that has name & details of a US serviceman who has posted it back to a Phoenix address from 'D.ROBBINS ,USS Carola , Brest , France' in the WW2 period. Helmet has the flaming grenade of infantry , cavalry etc. Liner untouched & of multi construction seen as of 1916. Address sent to back in the USA is ' Mrs F.ROBBINS, 1307, N Central Avenue . Phoenix, Arizona. ' Comes with chinstrap although detached at one end. French post home helmets are exceptionally unique & not often encountered.