I'm with SStk on this one. I think the decal is a repro and the helmet seems to have a number of other issues. Perhaps a more knowledgeable collector like Darryl will chime in on this. However, we all have to learn to be better at picking these out ourselves. We cannot forever rely on the expertise of others, though we much appreciate their help and guidance.
Cheers,
Mike

Magna res est vocis et silentii temperamentum.