Benedict XIII., September 26th, 1724, granted an indulgence of two hundred days for every Our Father and every Hail Mary to those who, with sincere contritition, and having confessed, or firmly purposing to confess their sins, shall recite this Chaplet on any Friday, or on any day of Lent, on the Festival of the Seven Dolours, or within the Octave; and one hundred days on any other day of the year.
Clement XII., December 12, 1734, confirmed these indulgences, and moreover granted:
A Plenary indulgence to those who shall have recited this Chaplet for a month every day -- Confession, Communion and Prayers for the Church, required as usual.
An indulgence of one hundred years to all who should recite it on any day, having confessed their sins, with sincere sorrow, or at least firmly purposing to do so.
One hundred and fifty years to those who should recite it on Mondays, Wednesdays and Fridays, and Holidays of obligation, with Confession and Communion.
A Plenary indulgence once a year, on any day, to those who are accustomed to recite it four times a week, on condition of Confession, Communion, and the Recital of the Chaplet on the day of Communion.
Two hundred years' indulgence to all who recite it devoutly after Confession; and to all who carry it about them, and frequently recite it, ten years' indulgence every time they shall hear Mass, hear a sermon, or reciting Our Father, and seven Hail Marys, shall perform any spiritual or corporal work of mercy, in honor of our Blessed Savior, the Blessed Virgin Mary, or any Saint, their advocate.
All these indulgences were confirmed by a decree of January 17th, 1747, and rendered applicable to the souls in Purgatory.