Below are two coins that have countermarks of a tetrastyle temple, similar, though not exactly the same, to Howgego 286 from Panormus, Sicily. The Howgego 286 cm was applied to 1st century coins like Augustus or Tiberius...these two coins were struck considerably later. “Gallienus BI Antoninianus. Rome, AD 264/5. GALLIENVS AVG, radiate and cuirassed bust right; countermark: tetrastyle temple / SECVRIT PERPET, Securitas standing to left, leaning on column, holding sceptre; H to right. RIC 280; C. 961; MIR 595w; for countermark cf. Howgego, GIC 286 (Panormus). 2.99g, 22mm, 6h.” “Constantine I Æ Nummus. Rome, AD 312-313. IMP CONSTANTINUS P F AVG, laureate, draped, cuirassed bust right; countermark: tetrastyle temple / S P Q R OPTIMO PRINCIPI, legionary eagle between two vexilla, RQ in exergue. RIC 349a; for countermark cf. Howgego, GIC 286 (Panormus). 4.12g, 22mm, 6h.” Interestingly these two coins were issued about fifty years apart and have the same cm...maybe done around the same time or perhaps some fifty years apart. Both coins also have considerable wear. Maybe a bit worn before cm'ing or perhaps after they were cm'ed they wore down more from prolonged circulation. So several questions (who, what, where, when and why) with no answers…only speculation.