[CORRECTION]. According to RIC, TRIER 409 has bust I1 (i.e. draped, holding mappa and Victory on globe). However, probably two varieties exist: a) with Constantine II dressed as a priest of Sol and holding sceptre and Sol on globe (see comment on this bust type in RMBT, p. 22; with incorrect suggestion that this bust is attested only for Constantine II); b) with Constantine II wearing trabea and holding sceptre and Victory on globe.
See also footnote 409 on p. 200: "In addition another Ox(ford) coin not with Victory on globe but with rad. Sol stg. on globe; the rad. crown clearly visible. A similar case in Mun(ich), where 1 specimen has the Victory on globe, another Sol rad. on globe". Listed in RMBT (p. 74, no. 143). Note that variety with bust I1 is listed in RMBT (p. 76, no. 153-154) but not illustrated and probably does not exist.
Note also that attribution of this coin (allegedly with Victory on globe) is uncertain and given after RMBT.
TRIER 409, CONSTANTINE II, [CORRECTION] [priest of Sol]
TRIER [after 397], CRISPUS, UNLISTED BUST TYPE [priest of Sol]