The heavenly calling didn't end in 1935, that is when the focus of the preaching work was to gather the great crowd.
However it was clear that the 144,000 was filled by that time. The first resurrection started in 1918 after the heavens were cleansed.
Why does there need to be "scriptural reason to believe that the heavenly calling ended in 1935"? In Acts 10 was there scriptural reason to believe that the gentiles were to be let into the fold? No. An angel gave cornelius the message and also to Peter.