I collect both FDC's and special cancels. Most new issues from Israel have a special cancel designed to go with them, and this Simon Wiesenhal sheetlet of 4 was no exception. Do you notice anything different about the cancels? The one in the center of the block is in silver, while the one on the bottom is in black. The special cancels provided from the Israel Post with my standing order were in black only. This is not the first issue I have seen it on (I believe they used the silver ink on the Holocaust remembrance stamp earlier this year, and maybe one or 2 last year as well). It is just interesting to me that they would only provide the black version to there special cancel subscribers.