I don't hunt these aggressively, but during more than a decade I've bought them casually, when they presented the right way. I even have a few duplicates. What many call the Parker Raven, but which was described (rather than named?) Parker's Raven Black and Gold pen in the 1929 catalogue appeared iirc through the 1932 Parker catalogue. Bummed that I could not find my chased plastic example tonight. I'm probably overdue to put together a small article about these. Had they not turned up in catalogues, no doubt they would be called "Thrift Time" pens by today's collectors. They have typical Parker contour and bland Parker imprint without series name.
Here are seven varieties.
regards
david