Then take silver and gold, and make crowns, and set them upon the {m} head of Joshua the son of Josedech, the high priest;

(m) Because this could not be attributed to any one according to the Law, therefore it follows that Joshua must represent the Messiah, who was both Priest and King.

Wesley's Notes

6:11 Make crowns - One of silver, the other of gold. Set them - Put both of them, one after another. Joshua - Who herein is now a type of Christ, king and priest for ever for his people.

Scofield Reference Notes

[1] crowns

Following the earth-judgments symbolized in the horsed chariots (Zech 6:1-8) comes the manifestation of Christ in His kingdom glory (Zech 6:9-15). This is the invariable prophetic order: first the judgments of the day of the Lord Isa 2:10-22 Rev 19:11-21 then the kingdom (cf) Ps 2:5 2:6 Isa 3:24-26 4:2-6 10:33,34 11:1-10 Rev 19:19-21 20:4-6. This is set forth symbolically by the crowning of Joshua, which was not a vision, but actually done (cf) Isa 8:3,4 Ezek 37:16-22. The fulfilment in the BRANCH will infinitely transcend the symbol. He "shall bear the glory" Zech 6:13 Mt 16:27 24:30 25:31 as the Priest-King on His own throne (Zech 6:12,13; Heb 7:1-3). Christ is now a Priest, but still in the holiest within the veil Lev 16:15 Heb 9:11-14,24 and seated on the Father's throne Rev 3:21. He has not yet come out to take His own throne Heb 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.

Jamieson-Fausset-Brown Bible Commentary

11. The high priest wore a crown above the miter (Zec 3:5; Le 8:9). Messiah shall wear many crowns, one surmounting the other (Re 19:12). It was a thing before unknown in the Levitical priesthood that the same person should wear at once the crown of a king and that of a high priest (Ps 110:4; Heb 5:10). Messiah shall be revealed fully in this twofold dignity when He shall "restore the kingdom to Israel" (Ac 1:6).

Matthew Henry's Concise Commentary

6:9-15 Some Jews from Babylon brought an offering to the house of God. Those who cannot forward a good work by their persons, must, as they are able, forward it by their purses: if some find hands, let others fill them. Crowns are to be made, and put upon the head of Joshua. The sign was used, to make the promise more noticed, that God will, in the fulness of time, raise up a great High Priest, like Joshua, who is but the figure of one that is to come. Christ is not only the Foundation, but the Founder of this temple, by his Spirit and grace. Glory is a burden, but not too heavy for Him to bear who upholds all things. The cross was His glory, and he bore that; so is the crown an exceeding weight of glory, and he bears that. The counsel of peace should be between the priest and the throne, between the priestly and kingly offices of Jesus Christ. The peace and welfare of the gospel church, and of all believers, shall be wrought, though not by two several persons, yet by two several offices meeting in one; Christ, purchasing all peace by his priesthood, maintaining and defending it by his kingdom. The crowns used in this solemnity must be kept in the temple, as evidence of this promise of the Messiah. Let us not think of separating what God has joined in his counsel of peace. We cannot come to God by Christ as our Priest, if we refuse to have him rule over us as our King. We have no real ground to think our peace is made with God, unless we try to keep his commandments.