I have just photographed a Constantius Chlorus Ant. from Lugdunum. It comes from the last issue pre-reform. This issue seems to be generally quite scarce. The more common depiction of Pax with Victoriola is replaced with an olive branch in these later issues.
This coin has patchy silvering which really detracts from the look making it quite unattractive.
Constantius Chlorus, Antoninianus
Obv:- CONSTANTIVS NOB C, Radiate, draped and cuirassed bust right
Rev:- PAX AVGG, Pax, standing left, holding olive branch and scepter
Minted in Lugdunum (//A). Emission 12, Series 2, Officina 1. A.D. 294
Reference:- Cohen -. Bastien 614 (3 examples cited). RIC V Pt. 2 Lugdunum 634

It goes along side a couple of other coins from the same issue and type.
Maximianus Herculius Antoninianus
Obv:- MAXIMIANVS

P

F

AVG, Radiate, cuirassed bust right
Rev:- PAX AVGG, Pax standing left, olive branch upward in right hand, scepter in left
Minted in Lugdunum (//A). Emission 12, Officina A. A.D. 294
Reference:- Cohen -. RIC V Pt. 2 408 Bust Type F. Bastien Volume VII 613 (5 examples cited)

Diocletian Antoninianus
Obv:- DIOCLETIANVS

P

F

AVG, Radiate, draped and cuirassed bust right
Rev:- PAX AVGG, Pax standing left, olive branch upward in right hand, scepter in left
Minted in Lugdunum (A in exe.). Emission 12 (Second series, short legends). A.D. 294
Reference(s) - Cohen 376. RIC V part II Lugdunum 70 Bust Type C. Bastien 617 (2 examples cited)

Martin