Outstanding Hobby Review Blog 

This post may contain affiliate links, which means we may receive a commission for purchases made through links. Read more on our Privacy Policy. Model trains have fascinated hobbyists for decades. If you have ever browsed through model train collections or shops, you might have noticed the letter O popping up often. But what does O stand for in model trains? This article will explore the meaning of O , its history, how it compares to other popular scales like HO, and why m