In the 1909 Breviarium S.O.P., the feast had the rank of "duplex", which would be considered a 2nd Class feast according to the rubrics of the 1962 Office. According to the Proper of the Saints, all was taken from the saints feast day, with the exception of Lessons i, ii, and iii at Matins, which were proper. These Lessons are extracts from the Bull of her Canonization.
O God, you enabled the blessed Catherine, graced with a special privilege of virginity and patience, to overcome the attacks of evil spirits and to remain unshaken in your love; grant, we beseech you, that following her example by treading underfoot the wickedness of the world, and overcoming the wiles of our enemies, we may pass tin safety to your glory. Through our Lord…