The helmet is fine original but who knows when the wire was added & by whom? I've collected Japanese headgear etc for almost 40 yrs & I've never seen wire on a helmet until recently. In my opinion, yes it's my opinion this is an anomoly & extremely unusual. Could they have used wire? Sure maybe but there is little to no period photographic evidence. I've seen on blurry pic with what looked like bale wire & that could of been added by a cash/trade hungry Seabee. I think it's the internet influence of German collectors starting to collect Japanese! That's slightly a joke by the way. The Japanese used nets! I'd recommend beginning collectors or dablers to buy a helmet with a net. Try & post net pics first as there are many repro nets out there. A "wire" Japanese helmet would keep me up at night. Go textbook until your at least certain about what your buying.