1969 camaro 140 mph speedometer question

[bigsixman]

I have a friend who says that he has seen a 69 camaro 140 mph speedometer that has a kph scale on the inside of the regular 140 mph scale. I have said that I have never heard of the dual scale. Did the export cars use a dual scale or a single kph scale? The topic came up in one of our conversations on the phone and I wanted to ask the experts on this site if anyone has heard of one like that.