For that occasion, a sheetlet was issued on the theme of zodiac signs.
|1957 Israel sheet with tabs|
A closer look to the centre of the sheet we'll see that the square in the middle is in fact a combination of 4 unperforated triangular stamps.
Unperforated isn't the right word, in fact the stamps are line pierced (percé en lines) which makes it easy to remove them out of the sheetlet.
|percé en lignes - line pierced|
|1957 Israel sheet (detail without tabs)|
The four stamps denominated 100, 200, 300 and 400 are very nice designed triangular stamps (see older post).
|Part of the sheetlet - cancelled|