#fermet

Czes has clearly been living on his own for quite some time when he gets on the train. He’s been able to continue his research and already has a history of making deals with the military to sell explosive byproducts. That sounds like a minimum of a few decades to establish himself. But is it thirty years ago, or 130? We have a major clue in the scene where Fermet is devoured:

The important detail here is the clothing. Fermet is wearing suspenders, specifically Y-back suspenders. The earliest suspenders were not invented until 1820, and of the three models (H-back, X-back, and Y-back), the Y-back evolved last.