Working on an triumvirate impression

[caiusbeerquitius]

Like what is the date the typical crossed belt with apron pattern appeared?

Somewhere between Dangstetten and Kalkriese horizonts, I´d say.
In Dangstetten (ca. 9 BCE) belt plates are basically absent despite the large number of finds. In Kalkriese / Augsburg / Rheingönheim they are there in larger numbers. I very much doubt that before that time there actually existed belts that were completely covered with plates. The republican belts by Erik König I think are very improbable repros.