The projo is probably a 6-INCH given 150.4 = 5.92 when you convert it. The length also matches the 6-INCH HE rounds. No idea which one it might be though.
Are there any other markings on the fuze? Might help to pin point the country that used it.
Joe
Are there any other markings on the fuze? Might help to pin point the country that used it.
Joe