Athletics New Zealand must be looking for a fresh parchment to engrave their middle-distance records.
Yesterday, Nick Willis broke a second national record and created a fourth personal best in the space of 66 days, demolishing his own 1500m mark and joining just 26 other men to have run under 3m 30s.
The 31-year-old clocked 3m 29.91s, the 86th fastest time over the distance and 0.44s better than his previous best, to finish behind six African athletes at the Diamond League event in Monaco.
The fastest 1500m times ever recorded by a fourth, fifth, sixth and seventh place-getter were set in the race won by Kenyan Silas Kiplagat.
The Monaco meet is where Willis has set his last three national 1500m records, the previous two coming in 2012 and 2011.