The BUF's left-wing opponents parodied the symbol as "the flash in the pan."
To proceed with this week's auction, officials had to overcome last-minute legal challenges from left-wing opponents.
However, there were both left-wing and right-wing opponents to it, including socialists and people who were very loyal to the Emperor.
The early history of the BUF saw a rapidly expanding movement becoming quickly embroiled in conflict with left-wing opponents.
The discontent of the monarchists and Falangists was as nothing by comparison with the rage felt by the regime's left-wing opponents.
Historians now say the killings were part of a coordinated effort by the government to crush its left-wing opponents.
From 1920 to 1923, nationalist forces continued fighting against the Weimar Republic and left-wing political opponents.
They only wanted it "under control" in the sense that they could use it on their terms against their left-wing opponents whenever it was necessary.
The principal allegation is that Gen Franco, together with 34 senior aides, oversaw a systematic campaign to eliminate their left-wing opponents.
Asked about left-wing opponents he has kept in jail for 18 months without trial, he veered from dismissive to bitter.