I have always thought the Dollar model was a US only product, with the equivalent English model being called the Relief 66 (or Relief 90 in gold tone), and carrying the Relief markings on both the cap and barrel stamp - thus making it difficult for the unschooled to identify it as an Esterbrook.
Below are two photos showing a recent delivery to my mail box. It is clearly marked "Relief" on the cap, but only "Esterbrook" & "Made in England" on the barrel. I believe It is also slightly larger than the Relief 66, and is made of plastic rather than the more usual BHR. As a bonus it appears pretty much mint (better than the photos suggest).
Anyone know any more about this variation?