31 July 1876,
They made matches with the symbol "Irurac bat." The Spanish authorities considered the Masonic symbol of the Real Sociedad Bascongada de los Amigos del País. Three hands are attached to the symbol. The Real Sociedad Bascongada de los Amigos del País was born in 1764 as a consequence of the conversations promoted by Count de Peñaflorida, Xabier María Munibe, and was the first enlightened society of the Spanish state.
Source:
Real Sociedad Bascongada de Amigos del País.