The 25c on 1E3 paper is undoubtedly the most common printing of this stamp. This type was used in 1941/42 and after 1943 with less frequency than in 1943, when it saw considerable use in a wide range of shades and colors.
This is the 1941/42 selection, mostly color rose.
This is the selection from 1943 onwards, with various colors: light, faint background, deep rose background, or deep colors.