Cambridge Audio Azur 840C CD Player Version 1 or 2

I have an 840C that I am selling and have been asked if it is a version 1 or 2? Anyone know how to tell? There is no designation on the unit. Thanks.
I think they are mistaken . The 840A integrated has a v2. Never heard or seen anyone here put that in there ad.
While there was not a version 2 for the CD player, there are some reports of a few internal changes over the many years the 840C was produced.