This will likely be rather rudimentary for experts and professionals, and the map itself isn't pre-1950 but I recently visited northern Italy and had my interest piqued by Aquileia; which lead me to begin looking for info on trade routes from which Baltic amber was able to reach ancient Egypt, Greece, Rome and The Caucasus.

I was aware that Cornish and Breton tin had been used in the Late Bronze Age in the Mediterranean but hadn't really considered the trading of Amber which for which the routes pre-date those for tin.

I find the idea of these ancient trade routes to be wonderfully thought provoking. Romanticising about how cultures like the Únêtice organised themselves and cooperated in order to facilitate trade.

If anyone here has spent any time reading about this trade route I would be grateful to hear of anything you found of interest regarding the settlements, societies, professions and daily lives of the peoples involved in this trade.