, bearing 2a. green pair with good margins, tied by "B/172" and London Paid c.d.s. in red and showing, on reverse, "SINGAPORE/P.O." c.d.s. in red; light central vertical fold. Photo" /> cover 1857 (Aug.) envelope to London, marked<I> "Overland via Southampton"</I>, bearing 2a. green pair with good margins, tied by "B/172" and London Paid c.d.s. in red and showing, on reverse, "SINGAPORE/P.O." c.d.s. in red; light central vertical fold. Photo | Christie's