If I were to.....................

[richfzs]

On the label sewn usually to the strap of your helmet will be  a number something like 05XXXXX/P-0XXXXXX, or 05XXXXX/J-0XXXXXX  or finally 05XXXXX/P-J-0XXXXX
P is tested for full face approval
J is tested for open face approval
P-J is Full and open approval
Unless the helmet is approved P-J it is illegal to use a flip front helmet with the chin bar open.

Thanks Tony, that's a nice way of identifying the differences I posted about earlier - cheers! :thumbup