The truth was that Jesus arrived in heavenly glory in 1874. He did, he did! and by 1914 paradise was to cover planet Earth. Ok, that didn't work so instead, let's say that 1914 was the end of the Gentile times and that the generation who saw 1914 would also see Armageddon, most certainly by 1975. Without a shadow of doubt! Ok then, some people just got a bit too enthusiastic (in particular the leaders) so let's all speculate: it has to come within a hundred years of 1914! No wait a mo, Jesus must have got it wrong; when he said "The generation that sees these signs" (his own contemporaries) he actually meant to say some overlapping generations as specified by the Watchtower Bible and Trap Society way off in the distant future.
Truth in the Watchtower is rarer than hen's teeth.