Hi I have this U413 cover that was used in 1908. The indicium is albino and only partially embossed, mainly on the left side. I am not an expert on these and am not sure how to distinguish between die 1 and die 2. I don't think this is die 3 or 4 based on the appearance of the E in UNITED. Too early for die 5.
Can anyone help please? Thanks in advance!

