*** w08 1/15 p. 23 par. 14 Counted Worthy to Receive a Kingdom ***
Hence, after 1935 the thrust of the preaching work turned to the gathering of “a great crowd,” those whom the apostle John saw in vision and who would survive “the great tribulation.”—Rev. 7:9, 10, 14.
*** w15 1/15 p. 17 par. 18 Why We Observe the Lord’s Evening Meal ***
On the other hand, if you are part of the “great crowd” of “other sheep,” God has given you the earthly hope.
IT seems that some individuals that were part of the great crowd of other sheep that died of old age and other causes are obviously not part of the great crowd that survives the great tribulation. For argument sake lets say that in 1935 there were some that could live through the gt and were 15 years old at the time 1935-15=1920. Now, here we are 2017, those sheep are 97 years old!.
ON the other hand, I must admit that the great crowd of 1935 must at the very least have had the opportunity to live long enough otherwise if they were destined to die of old age, they never had a chance to be part of the surviving great crowd. And that means that they never were part of the great crowd to begin with. But as long as there was a chance for them to be part of the great crowd that ultimately lives through the gt no matter how old -it is valid.