I've still got a timetable leaflet for X60/X61. I've dug it out and I'm looking at it as I type this.
It's dated as from 6 April 1997 and it did actually go to Oxford by that date, so obviously long after you left the industry.
There were three journeys Mon-Fri. from Nottingham departing at 1030 (Oxford 1435) 1227 (Ox 1635) and 1427 (Ox 1835)
Only the 1030 ran on Saturdays. On Sundays the only journey from Nottingham was at 1455.
Most of the other journeys were Leicester to Northampton (1hr 25 mins) or Northampton to Oxford (1hr 30mins)
A few sample fares were given: Nottingham - Northampton £5.20 Single / £5.65 Day Return / £10.05 Period Return.
Leicester - Oxford: £8.90 Single / £10.65 Day Return / £11.10 Period Return.
Although the service had X numbers, it appeared to operate as a local bus service throughout much of it's distance.
The leaflet markets the service as 'Coachlinks' there is no mention of Stagecoach at all, would 1997 be before their time?
It was obviously a viable route for many years, what would be the reason for it's demise?