I collected all three emperors with reverse REQVIES OPTIMORVM MERITORVM. Post your examples and what you think is relevant. Why is struck for these three emperors only? Divus Claudius Gothicus. Half Follis. Struck under Constantine I. Thessalonica. Obv: DIVO CLAVDIO OPTIMO IMP, Veiled and laureate head right. Rev: REQVIES OPTIMORVM MERITORVM / TSΓ, Emperor seated left on curule chair, raising hand and holding sceptre. RIC 26. Divus Maximianus. Half Follis. Struck under Constantine I. Siscia. Obv. DIVO MAXIMIANO SEN FORT IMP, laureate and veiled bust right. Rev. REQVIES OPTIMORVM MERITORVM, Emperor veiled, seated left in curule chair, holding short sceptre, SIS. RIC 41. Divus Constantius I. Half Follis. Siscia. Obv: DIVO CONSTANTIO PIO PRINCIP, Laureate, veiled and draped bust right. Rev: REQUIES OPTIMORVM MERITORVM/ SIS, Emperor, veiled, seated left on curule chair, holding sceptre and raising hand. RIC 42.