For the scarcer papers/printings, I find three 25c Straight Rays, one horizontal and two vertical.
I also find a few late 50c, the 50c1L5, white Zarate paper, distinguishable by the almost complete absence of the watermark. For now I refer to the white and grayish Zarate papers with the same reference (1L5).
and a few 50c clays (50cCL2)