The following pen is mine, recently pulled from the 1000-item hoard of old pens I grabbed last summer (most being low tier, no worries). I still have not sorted the hoard, but one of the fun things is finding decent examples of early pens, including some store-brand pens.
So, I'd f gured the following Moore was just a decent (has some cap lip chipping) moderate size pen. Witth a "450" imprint ($4.50?) it is chunkier than the basic skinny models found, and is a bit more than 5" in length. It was when I peeked at the imprint that I grew more interested.
Perhaps this means little to serious Moore collectors, but for me-- a not so serious Moore collector-- this was the first seen with a "TWISTOUT" imprint.
So. I seek information. Common imprint? Interesting imprint? Any documentation known? Niche?
Here are images of the pen:
regards
David