As Art states, and according to the 1970 Hamtramck Registry library, Plymouth called it 'Moulin Rouge, Dodge called it 'Penta-Magenta. They show it as being availible in the * Spring of 1970. But, from reading the litrature they show for 1971, it seems possible that you could have 'special ordered' the color. Not sure where the 'Panther Pink' name comes from, maybe some sales/advertising campaign around that time.