These he transferred in light pencil onto large sheets of Arches 300-pound hot-press paper, some of them as much as six feet in length, at which point Zega set to work painting the reconstructed edifices in intense watercolor hues, taking as long as a month on each.

FORBES: Palace Coup

Unlike previous schemes which have relied on paper, the Bristol Pound can be used online, even by mobile phone.

BBC: Bristol Pound launched to keep trade in the city

Even today private banks in Northern Ireland and Scotland issue pound notes redeemable into pounds sterling, and in Hong Kong paper currency is supplied exclusively by private banks.

FORBES: Magazine Article