Here is what I was looking for, and as far as I know, the only admission of a post vs. 28 1st century fulfillment. Now if they could only scripturally support their claims of a greater fulfillment.
*** w08 2/15 pp. 23-24 pars. 11-14 Christ’s Presence—What Does It Mean to You? ***
11 It is true that when Jesus used the word “generation” negatively, he was speaking to or about the wicked people of his day. But was that necessarily true of his statement recorded at Matthew 24:34? Recall that four of Jesus’ disciples had approached him “privately.” (Matt. 24:3) Since Jesus did not use negative qualifiers when speaking to them about “this generation,” the apostles would no doubt have understood that they and their fellow disciples were to be part of the “generation” that would not pass away “until all these things [would] occur.”
12 On what basis may we draw that conclusion? By carefully considering the context. As recorded at Matthew 24:32, 33, Jesus said: “Now learn from the fig tree as an illustration this point: Just as soon as its young branch grows tender and it puts forth leaves, you know that summer is near. Likewise also you, when you see all these things, know that he is near at the doors.” (Compare Mark 13:28-30; Luke 21:30-32.) Then, at Matthew 24:34, we read: “Truly I say to you that this generation will by no means pass away until all these things occur.”
13 Jesus said that it was his disciples, soon to be anointed with holy spirit, who should be able to draw certain conclusions when they saw “all these things” occur. So Jesus must have been referring to his disciples when he made the statement: “This generation will by no means pass away until all these things occur.”
14 Unlike unbelievers, Jesus’ disciples would not only see the sign but also understand its significance. They would “learn” from the features of that sign and “know” their true meaning. They would fully appreciate that “he is near at the doors.” While it is true that both unbelieving Jews and faithful anointed Christians saw a limited fulfillment of Jesus’ words in the first century, only his anointed followers back then could learn from these events—could understand the true meaning of what they saw.