In the document in question, twelve men are mentioned by name as having to vouch to Countess Loretta of Sponheim that they would prevent any flight from the land.

The road from Metz by way of Birkenfeld to Oberstein crossed the way from the Moselle by way of Allenbach to the Frauenburg (castle) and on to the river Glan.

In the 1438 Sponheim taxation book listing payments in kind, it was noted that ten considerable farmsteads were to be found in Oberbrombach, but that nobody dwelt there any longer.

Many times the reeves had to avail themselves of help from the Amt administration in Birkenfeld to defend the ancestral municipal and grazing rights boundaries against livestock herds from Rötsweiler and those belonging to the tenants of the lordly Winnenberger Hof (farming estate).

From 1830 to 1890, 91 persons emigrated from the village, most out of pure need, to seek better economic conditions elsewhere, mainly in North and South America.

The farming population's burden of work was greatly lightened when the municipality acquired a steam-powered threshing machine.

Over the years that followed, Oberbrombach's steam threshing machine found itself in service in many of the surrounding villages, too; it could be hired at hourly rates.

Standing in contrast to the general poverty suffered by most people in the village in the latter half of the 19th century was the municipality's own wealth.

The earnings were lent out to interest-paying borrowers in the area and partly also invested in fixed-interest bonds.

In 1825, the municipality made a building – a herdsman's house – available as a Schullocal (roughly “branch school”) for the first time.

Instead of having to trudge daily down to the mill on a river several kilometres away to work at their trade, they could now set up grinding and polishing shops right in their houses.

Agriculture quickly lost much importance, and gemstone grinding temporarily enjoyed an economic boom, but its heyday only lasted until the 1960s.

[1] The municipality's arms might be described thus: Or a bend wavy abased and in sinister a blackberry palewise, the stem couped to base, all vert, the chief countercompony gules and argent.

The following are listed buildings or sites in Rhineland-Palatinate’s Directory of Cultural Monuments:[5] Running through the village is Bundesstraße 41.