József Skopáll (~1814-1870) 1861, 8 August About a huge photographic car studio of the photographer József Skopáll (~1814-1870) which is standing on a the Carmelita place. Internet - Original source ill-defined Gyori Közlöny, 8. August 1861. A Hungarian political weekly from the city of Gyor in western Hungary. Later the same year (1 December 1861) the same weekly reported that the photographic car had left and been replaced with an other photographer's car.
I'm indebted to Bálint Flesch for bringing this to my attention (21 February 2018).