The oth, "ensign," was the small flag or banner which was carried at the head of each tribe
and of each subdivision of a trible. Manners and Customs of the Bible: James M Freeman
E. W. Bullinger: Witness of the Stars - Companion Bible

 

For Signs and For Seasons

 

Genesis (B'resheet) 1:14  - And God said, "Let there be lights in the firmament of the heaven to divide the day from the night;  and let them be for signs (oth), and for seasons, and for days, and years:

Such are the contents of this wondrous book that is written in the heavens. Thus has God been speaking and emphasizing and developing His first great prophetic promise of Genesis 3:15. Though for more than 2,500 years His people had not this Revelation written in a book as we now have it in the Bible, they were not left in ignorance and darkness as to God's purposes and counsels; nor were they without hope as to ultimate deliverance from all evil and from the Evil One.

Adam, who first heard that wondrous promise, repeated it, and gave it to his posterity as a most precious heritageó ground of all their faith, the substance of all their hope, the object of all their desire. Seth and Enoch took it up. Enoch, we know, prophesied of the Lord's coming, saying, "Behold the Lord cometh with ten thousands of His saints to execute judgment upon all" (Jude 14). How could these "holy prophets, since the world began," have recorded their prophecies better, or more effectually, or more truthfully and powerfully, than in these star-pictures and their interpretation? This becomes a certainty when we remember the words of the Holy Spirit by Zacharias (Luke 1:67-70):

These pictures were designed to preserve, expound, and perpetuate the one first great promise and prophecy of Genesis 3:15, that all hope for Man, all hope for Creation, was bound up ina coming Redeemer; One who should be born of a woman; who should first suffer, and afterwards gloriously triumph; One who should first be wounded by that great enemy who was the cause of all sin and sorrow and death, but who should finally crush the head of "that Old Serpent the Devil." These ancient star-pictures reveal this Coming One. They set forth "the sufferings of Christ and the glory that should follow." Altogether there are forty-eight of them, made up of twelve SIGNS, each sign containing three CONSTELLATIONS.

These may be divided into three great books, each book containing four chapters (or Signs); and each chapter containing three sections (or Constellations).

Each book (like the four Gospels) sets forth its peculiar aspect of the Coming One; beginning with the promise of His coming, and ending with the destruction of the enemy.