crowns
Following the earth-judgments symbolized in the horsed chariots (Zechariah 6:1-8) comes the manifestation of Christ in His kingdom glory (Zechariah 6:9-15).
This is the invariable prophetic order: first the judgments of the day of the Lord; (Isaiah 2:10-22); (Revelation 19:11-21) then the kingdom (cf); (Psalms 2:5); (Psalms 2:6); (Isaiah 3:24-26); (Isaiah 4:2-6); (Isaiah 10:33); (Isaiah 10:34); (Isaiah 11:1-10); (Revelation 19:19-21); (Revelation 20:4-6). This is set forth symbolically by the crowning of Joshua, which was not a vision, but actually done
Compare (Isaiah 8:3); (Isaiah 8:4); (Ezekiel 37:16-22).
The fulfilment in the BRANCH will infinitely transcend the symbol. He "shall bear the glory"; (Zechariah 6:13); (Matthew 16:27); (Matthew 24:30); (Matthew 25:31) as the Priest-King on His own throne (Zechariah 6:12); (Zechariah 6:13); (Hebrews 7:1-3).
Christ is now a Priest, but still in the holiest within the veil; (Leviticus 16:15); (Hebrews 9:11-14); (Hebrews 9:24) and seated on the Father's throne (Revelation 3:21). He has not yet come out to take His own throne (Hebrews 9:28). The crowns made for the symbolical crowning of Joshua were to be laid up in the temple as a memorial to keep alive this larger hope of Israel.