This specimen shows the outer lines that are drawn between stamps. Quick links: main page / postmarked "12" specimen / postmarked "142" specimen / postmarked "102" specimen

Below is a back scan of this stamp showing the vertical silk thread

Below is a design highlight: the numeral

Below are three corner details. The upper left corner has a diagonal notch inside the outer line. The lower left corner doesn't have any line breaks, but the upper knob of the three mixes in with the white lozenges. The lower right corner is the most obvious plate break for this stamp, with a lower right break into the 3 cartouche.