Note: This was in a Box labelled “1914”, however is it believed to be 1915.
István Csók 50th birthday at a “Kagál” dinner.
István Csók (front): https://hu.wikipedia.org/wiki/Cs%C3%B3k_Istv%C3%A1n_(fest%C5%91)
Ferenc Székely (back): https://hu.wikipedia.org/wiki/Sz%C3%A9kely_Ferenc_(bank%C3%A1r)
I think the picture shows the painter István Csók (1865-1961) and the banker Ferenc Szekely (1858-1935). Probably at one of the meetings of the Borsszem Jankó magazine, which they were both associated with. László Isépy was also associated with the magazine.
https://hu.wikipedia.org/wiki/Sz%C3%A9kely_Ferenc_(bank%C3%A1r)
https://hu.wikipedia.org/wiki/Cs%C3%B3k_Istv%C3%A1n_(fest%C5%91)
Thank you for the information. Post Updated.