For you, drafdog, a dose of the real world of episcopal rings (note: they are more than just office machines):
Knowing, as we do, that in the
pagan days of
Rome every flamen Dialis (i.e., a
priest specially
consecrated to the worship of Jupiter) had, like the senators, the
privilege of wearing a gold ring, it would not be surprising to find evidence in the fourth century that rings were worn by
Christian bishops. But the various passages that have been
appealed to, to
prove this, are either not
authentic or else are inconclusive. St. Augustine indeed speaks of his sealing a letter with a ring (Ep. ccxvii, in P.L., XXXIII, 227), but on the other hand his contemporary Possidius expressly states that Augustine himself wore no ring (P.L., XXXII, 53), whence we are led to conclude that the possession of a signet does not
prove the use of a ring as part of the episcopal insignia. However, in a
Decree of
Pope Boniface IV (A.D. 610) we hear of
monks raised to the episcopal dignity as anulo pontificali subarrhatis, while at the Fourth Council of Toledo, in 633, we are told that if a
bishop has been
deposed from his office, and is afterwards reinstated, he is to receive back
stole, ring, and
crosier (orarium, anulum et baculum).
St. Isidore of Seville at about the same period couples the ring with the
crosier and declares that the former is conferred as “an emblem of the pontifical dignity or of the sealing of secrets” (P.L., LXXXIII, 783). From this
time forth it may be assumed that the ring was strictly speaking an episcopal ornament conferred in the
rite of
consecration, and that it was commonly regarded as emblematic of the
betrothal of the
bishop to his
Church. In the eighth and ninth centuries in
manuscripts of the Gregorian Sacramentary and in a few early Pontificals (e.g., that attributed to Archbishop
Egbert of York) we meet with various formulae for the delivery of the ring. The Gregorian form, which survives in
substance to the present day, runs in these terms: “Receive the ring, that is to say the
seal of
faith, whereby thou, being thyself adorned with spotless
faith, mayst keep unsullied the troth which thou hast pledged to the spouse of
God, His
holy Church.”
newadvent.org/cathen/13059a.htm