For those who may not know, Atlas has a website that records all of their produced product types (Master, Trainman, etc.) and scales (O, HO, N, etc.) for research or informational purposes. The author has used this many, many times to give him some idea of what he just bought at an estate sale or swap meet.
It is located here.
If you are wondering how old that car is that you just bought, and you know it's an Atlas, check it out.
If you have an idea for a blog post here, let me know. If I can comment on it, I will or I'll see if someone else can and post it