Bristlers

The manufacturers agreed not to maintain any relations with the Bristlers' Trade Union, and they also agreed to introduce piecework wages where such wages did not exist, and to reduce the scale of piece-work where they did exist.

Source: wiktionary

In the spring of 1851, then, the "lowest of the low" invented the "Bristlers", whom Vogt pilfered from his Field Marshal in the autumn of 1859.

Source: wiktionary

Large parts of the book dealt with police agents among the democratic and socialist Forty-eighters abroad, and much of this was connected to Marx, who appeared as a sinister figure in the background orchestrating the undoing of innocent workers attracted to the cause through the Brimstone Gang (Schwefelbande) or the Bristlers (Bürstenheimer), both named after groups of German refugees in Switzerland.

Source: wiktionary