Value: 3
Confidence: Canon
Han China, Roman Empire, advanced iron working, engineering, road networks. Class 3 Bronze/Iron.
Value: 0.46
Min: 0.4
Max: 0.5
Confidence: CalculatedGuess
Pottery (ovens), but no other energy consuming industry. Manual labor (not changing per capita consumption), some animal labor, few wind and water mills. Still 200 W for most people. Total might be 250 W.
Value: 100e6
Min: 70e6
Max: 200e6
Confidence: Canon
References:
Quick Wikipedia research. Error bars guestimated.
Value: Iron Age
Confidence: Canon
Advanced metalworking, engineering, road networks.
Value: 3
Confidence: Canon
TL 3 Metal. Iron working, engineering, road networks. Hardest tech: iron smelting at ~1500 C, Roman concrete, aqueducts. Same TL as Bronze Age, since iron is harder to smelt but same fundamental metalworking principle.
Many towns and cities in populated parts of the world but still hunter gatherers. Basically Han China and the Romans plus many regional Bronze Age powers.