70 Swinger Dash Question

Rallye dash? In the 30 years I have been paying attention I have never seen a 70 340 Swinger with a knob radio. But that doesn't mean it didn't happen! There was a 1970 340 Swinger on BAT a while ago that had a rallye dash with a knob radio.

https://bringatrailer.com/listing/1970-dodge-dart-swinger-2/

That BAT car had a late June build date, so I was thinking that perhaps they ran out of 1970 Dart dashes and just started using 1971 Demon dashes. But I saw someone mention in the comments that his was built the day before and has a thumbwheel radio, so who knows.