Lock Tumblers in the Book of Revelation
7th seal opens up the 7 trumpets and the 7th trumpet pours out the 7 bowls. See
Trumpets, Seals, Bowls.
The 6 secretive seals are the past 20 centuries in the mystery of the church age.
Before the 7th seal is opened which opens the 7 trumpets, the living overcomers (Rev. 12.5) in the Church are raptured at the start of the Tribulation. The Tribulation is 7 years in duration. The last week of Daniel's prophecy represents 7 years like the other 483 weeks. They are seen raptured at Rev. 7.9 (the man-child in Rev. 12 provides more details), for those that overcome in Christ who don't have to go down to Hades (rest), but are raptured alive to the throne and who escape not just trial but the Hour of trail itself (see Rev. 3.10, Luke 21.36).
As the Tribulation proceeds through the 7 trumpets and individual raptures like the Two Witnesses take place 3.5 days after they go to rest, we approach the big resurrection or general resurrection/rapture at or just before the 7th trumpet (1 Cor. 15.50-52, 1 Thess. 4.15-17). The last trumpet rapture and resurrection gives believers comfort they will be awakened and raptured together. It occurs pre-wrath (pre-bowls) immediately following the 2nd woe (6th trumpet). This is marks a completion with gleaning raptures that may take place individually through the last 24 months.
Incidentally, the 19th month of the Great Tribulation corresponds with the first month of the last trumpet or 3rd woe. The 42 months of the first three and half years take place. The second three and a half years comprise the 5 months (Rev. 9.5) of the first woe (1st trumpet), 13 months in the second woe (9.15), which leaves 24 months left for the 3rd woe or 7th trumpet.
Rev. 11.1, "worship therein," comprise or designate the raptured believers from the first rapture and martyrs during the Tribulation who are raptured individually 3.5 days after rest, like the two witnesses; then, in verse 15 "there were great voices in heaven" whom are all the believers raptured in full from 1st rapture to 7th trumpet resurrection. The segmented raptures from any gleanings of martyrdom during the last 24 months should also be taken into account however few there may be.
The 7th trumpet opens up the 7 bowls. While the trumpets are loud and clear, the bowls are neither loud nor are they secretive. Instead, the bowls are bigger than a cup and are silently poured as if time stand stills in the events of the last 24 months of the Tribulation. It really feels like time has come to a standstill when so much happens frighteningly all at once. Even men of great strength will cry in shock and awe.
It is at the 1260th day of the Great Tribulation Christ returns with His First Resurrection (Rev. 20.4) overcomers (Jude 14,15), God's armies, on the mount of olives (Zech. 14.4, Acts 1.11, Rev. 1.7) to reign for the last 1000 years or great length of period on earth before it is burnt up. Notice the 1000 years is mentioned 6 times in Rev. 20.2-7. It is a very important time that bridges the dispensation of grace (mystery age of the church) to eternity future of the New City and New Earth.
God's 30 day judgment is from the 1260th to the 1290th day. Remember, God calculates in 30 day months during the Tribulation for our sake and ease of understanding.
Another 45 days to the 1335th day (search for number "1260" in the link for further evidence of this) cited in Scripture are required to set up the Jews as the center of all nations and receive glory, but not as as overcomer kings and priests.
The rest of mankind who were not killed by these plagues did not repent (Rev. 9.20). There you see the world of unsaved on earth under God's wrath and a remnant Jewish population, but overcomers would have nobody to rule over if all the rest were wiped out, nor would God's promise be kept to Israel to be the center of all nations. So God gets rid of the worst of the lot in Armaggedon (last 24 months: 3rd woe: 7th trumpet) but still leaves 2/3rds of the population (9.18) to reign over. You can't have kings nor priests in Revelation 20 without subjects.
That is how it is all going to come down as best as I can tell.