Actually, that sort of tech fits within the time line. Radio waves Radio waves were first predicted by mathematical work done in 1867 by Scottish mathematical physicist James Clerk Maxwell. Maxwell noticed wavelike properties of light and similarities in electrical and magnetic observations. He then proposed equations that described light waves and radio waves as waves of electromagnetism that travel in space, radiated by a charged particle as it undergoes acceleration. In 1887, Heinrich Hertz demonstrated the reality of Maxwell's electromagnetic waves by experimentally generating radio waves in his laboratory. Many inventions followed, making use of these 'Hertzian' waves to transfer information through space.
So yeah, the radar's fall within the timeline. There was some modern tech in the first few arcs, but Yana has since gotten rid of them for more historic accuracy.
it's calling "Steampunk"
http://en.wikipedia.org/wiki/Steampunk
OMG. I feel really sorry for her. those dang villagers, I never liked them from the start. Though I did like Sebastian fan-girling a little bit over the tech. I hop e we see more of that. But it kinda makes me sad that tech might come in this show. that's the whole reason why it's appealing, magic powers but no tech. but I not the mangaka so I can't do anything.