Priest's rosary 3: as seen from the back.
Ordinarily such a large crucifix would provide a lot of space on the back for an engraved message, but that is not the case here because of the slump in the center of the cross. The slump is formed as the molten metal hardens and contracts as it cools in the mold.
The back of the centerpiece shows a descending dove and a sunburst of seven rays, showing the descent of the Holy Spirit and his seven-fold gifts (Isaiah 11:2-3). The Latin words around the top of the medallion are "Veni Creator Spiritus" (Come Creator Spirit). Together with the image on the front of the Father reconciling His prodigal son to Himself, this image of the Holy Spirit recalls Christ's words to the apostles, "When he had said this, he breathed on them; and he said to them: Receive ye the Holy Ghost. Whose sins you shall forgive, they are forgiven them; and whose sins you shall retain, they are retained." (John 20:22-23).