I'm not sure specifically what Bert's machine story was about without more context. Maybe it was about a magical machine that could do amazing things like produce infinite amounts of candy or turn dirt into gold.
Well, it's hard to say for sure. It could be based on some fictional elements or imagination rather than real events. But without more context, it's difficult to determine its authenticity.
The story in The Time Machine is told through the protagonist's adventures and his first-person narration. It gives a vivid account of his time-travel experiences.