british contract 1911

[andy_ita]

hi guys
Andy in italy here
i picked up today this .455 british service colt 1911

im reading all the books i have to get info but something not look good to me.
the pistol have the british broad harrow and acceptance mark. the barrel is a .455 marked with a W
but the serial number seem to be out the british contract and near the disconector the pistol doent have the E mark.

what do u think about it??
thanks
andy