Harare - Heralded by Zimbabwe's central bank and its President Emmerson Mnangagwa as the answer to an acute cash shortage that has hamstrung the country's economy, new low-denomination banknotes were due to enter circulation on Monday.
But by noon (1000 GMT) they had seemingly failed to arrive.
Banks visited by Reuters had yet to receive the new bills, and Reserve Bank of Zimbabwe (RBZ) Governor John Mangudya said he could not immediately comment on why they had not been distributed.
The dearth of cash, along with shortages of staple goods exacerbated by a long drought, has crippled the economy, sending inflation - which economists estimate is running at 380% year-on-year - to its highest since 2008.
In that year, hyperinflation wiped out many people's pensions and savings and forced the country to dump the Zimbabwe dollar currency.