While time has advanced to 1920, technology has failed to keep up, the constant fighting has been an economic drain preventing research into new areas or improvements. This action of the Reclaimers has also stagnated technology for reasons only known to them. This has resulted in a world that’s about 40 years behind our own when it comes to what is known and available for purchase.
When in doubt what was available in 1880 is available for purchase but general technology has not progressed past this point.
With that said, certain inventors or perhaps mad scientist have created items far beyond this. What these people can do and have access to is far far advanced from what the average citizen can use or get their hands on.