Differences between 1967 & 1968 AM radios

[x66 714]

A couple of years ago I purchased a "just been serviced" what we all call a 67/68 am radio for really dirt cheap. It was less money than the invoice cost that was still in the box. I wanted it for my 68 but in actuality, it's for a 1967. So, my question is, is there any differences between 67 & 68 am radios? Lens, light colour, etc? Thank you, Joe

[MO]

As far as I know, 67/68 are interchangable. 69 is different.