those round side marker lamps

[RedFish]

While searching for an am/fm radio at a swap meet the guy next to me was asking about round side markers. The seller had 2 of the flat chrome type but the buyer wanted the ones with the slight angle. Seller says something about the angle ones being more rare. I didn't even know there were 2 types.
So my question is what cars had the angled chrome bezel fixtures and/or how rare are they ?

 

[OneOfMany]

Could be wrong, but didn't the 68 Dart use them on the front and rear because of the body line?

Grant

 

[redfastback]

if i remember correctly, the more flats are plymouth, the angled are dodge. i could be wrong though.