Lot 50758 – 1855 4a black on blue diagonal bisect on large part front from Singapore to Batavia

1855 4a black on blue diagonal bisect on large part front from Singapore to Batavia, tied by “B / 172” octagonal cancel (smudged), with ms “30” adjacent along with commercial sender’s cachet, a little ink corrosion to the address, an extremely rare bisected usage with only five covers with single bisects recorded; cert. Pascal Scheller (2025).