It's a MkII...but in pretty sad shape. Not sure what the euro is at right now but I would wait for one with better paint for that price.
MKII with a post-war chinstrap I think. You paid abit too much for it in this condition. Are there any dates/stamps on the rim or bales?
There will be better ones than this tired one, chin strap looks like the MkIII introduced from 1941 onwards.
The darker coloured elasticated straps I think were produced during the 50's. So I would say all khaki coloured ones are WW2.
I believe at the moment 1 euro is 1.35 USD.
I dont think its British. Its not a Kelly helmet either, to my knowledge. Saw one like this somewhere, Israeli maybe?