Note: Both RIC 17 and RIC 60 cite Cohen 1, and are often mistaken for each other.

In RIC "Period II", the portrait of the latter coins ought to exhibit a smaller, rounder head,
a less hirsute appearance, and a cuirass more visible than that on coins from earlier  emissions.

Bastien lists his equivalents both with (p. 202), and without punctuation (p. 203), which is missing from RIC 60.

Comparing the length of the cuirass is thus the easiest method to determine the difference.
Comparison of RIC 17 to RIC 60

RIC 17: only top of the cuirass visible, sometimes with a pronounced undershirt.
RIC 60: a few rows of ring mail are visible, less emphasis on the undershirt.

Many coins catalogued as RIC 60 are, in fact, RIC 17.

6th emission of Lugdunum, IV 278 - 279 CE.

Probus antoninianus/aurelianus RIC 60, Bastien 293
RIC 60; Bastien 293a; Lugdunum. Bust type F. Denomination: Antoninianus.
OBV.: IMP C PROBVS P • F • AVG

Radiate, cuirassed bust right.

REV.: ABVNDANTIA AVG

Abundantia standing right, emptying cornucopiae.

Mintmark: // IIII
IMP C PROBVS P dot F dot AVG
Last revision: 22.04.2017