Maybe a German helmet?

[edelweiss123]

Possibly, but i think they'd be equally common everywhere.

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I can buy an M18 on ebay for £24 at the moment

[Datrus]

LOL All have been said but i had a few Whiskey/Cola's so i will chime in and say "Swiss lid" I'm in Russia again

Cheeeers lads and Lasses

[timothy]

Swiss helmet .I think there are some listed in book steel helmets of the world or world helmets I haven't seen it for years you could look on amazon for it there has been a lot of articles about the various Swiss M-18 etc. I don't collect them. timothy

[cricketchris1944]

170$ is way too much.
They are not selling here in the US.
10$ to 20$ I would pay. But no collector buy them.
chris