That seems extremely good value! Were these from JLR direct, or an eGay find? EDIT: a quick look online seems to indicate they are the same part number as for XJ 2010 on - LR070840
T'was Gay of E. I'd need to cross ref the part numbers, as LR is Landrover, JDE is Jaguar, and C2D is part of the long term plan to align part numbers and prices (LR were always cheaper... ...but fear not, LR prices are rising to match Jag, not the other way round, bastids).
I expect the later XJ ones are different, as the system reports tyre pressures. Mine just alerts if one is 25% less than it should be, or something like that.
As far as I can work out, mine are original, so coming up to 13yrs old if fitted at factory, or about 12yrs old if fitted at PDI. Mileage wise, not quite 150k - It turned over 147k at precisely the time I was waving to that Grand Tour come Farmer geezer in his L322... ...I might have been a bit distracted looking at the dash, and not at him pulling out