From both of them, from one after 2 and from the other one after 3 moves the position of the diagram's reached, regards
Good find! PDB has got the second version of YACPDB (YACPDB #290653) in its database (PDB P1296195) with unknown source and apparently a wrong year (1931 instead of 1937), but points to a reprint that I found:
Gaudium 111 (August 11th, 2011) (The reprint given by PDB with the problem Nr. 612 and solution, unknown source, apparently wrong year and asking help to find the source).
Gaudium 112 (September 7th, 2011) (Thanking information from two readers, both pointing to 1937 instead of 1931, but giving two different magazines: Schackvärlden and Revista de Romana de Sah, claiming that 1931 is still widely seen on the Internet).
Schackvärlden was a Swedish magazine (photo of a 1937 issue here, showing 'Göteborg' and 'Stockholm') and Revista Română de Șah (the correct spelling) was a Romanian magazine. I would say that one of the given sources is an early reprint of the other.
