Comparison of the 1L2 and 1L4 papers

I am still undecided if the 1L2 and 1L4 are separate papers or the same paper with a small printing run variation. The 50c1L2 is a common stamp. Here is the watermark.



The 1L4 is very similar in colors but has a whiter paper and slightly worn out watermark.



Here is the watermark for the 1L4.



This comparison shows the relative wear of the watermark features for the 1L4 paper. These are false colors caused by digital filtering. The 1L4 paper is noticeable whiter than the 1L2 paper.