Two new things concerning the from-Masonic-G-to-Anarchist-A theme.
David Leopold was kind enough to show me the image to the left above. It is the membership card for the left-chartist group Fraternal Democrats, active between 1845-1853. It is obviously masonic and most certainly influenced the emblem for the First international (1864–1876). Marx and Engels were in contact with the Fraternal Democrat group from its start. Moreover, the emblem looks very much like an A.
The emblem for the Spanish branch of the First International, to the right above, is indeed not reproduced in the version by historian Alberto Valín Fernández that I referred to in my latest post, but it in fact appears in another version: http://win.masoneriamadrid.eu/LA%20MASONER%CDA%20Y%20EL%20MOVIMIENTO%20OBRERO.pdf
From the frontcover to The Democratic Review of British and Foreign Politics, History and Literature (1850). Harney, G. Julian (ed.). Vol. II. London: J. Watson.