Considering he's still winning stuff, he has a chance of beating some Rebellin (RIP) records. At the age of 46 and two months, Rebellin was the oldest winner of a .1 category race when he won a stage of the Tour of Iran. Oldest winner of any UCI race (a stage in the 2.2 Tour International de la Wilaya d'Oran) was also Rebellin three months before his 47th birthday. Sevilla nearly beat this record when he won the time trial of the Vuelta a Formosa in May this year, four-and-a-half months before his 47th birthday. Sevilla actually got his victory a few days later in the year than Rebellin did, but he's born one-and-a-half months later in the year. Sevilla's recent stage win at the non-UCI Clásico RCN is arguably higher level than the Algerian race where Rebellin won.
(The records are valid for this milennium at least. It's hard to find data from way back.)