How old is Winchester model 290-22 long rifle serial number 461090?

The Winchester model 290 belonged to the 200 series of .22cal rifles.This included the model 250,270,290,255,and 275 models.Winchester did not keep records of the serial numbers on these rifles.I can say that these models were introduced from 1963-1965,and the model 290 was discontinued in the year 1976.