I wrote a short web page about Roman imperial coins with legend including SECVRITAS, which has an obvious modern meaning which is not quite the same as its meaning on early Roman imperial coins. http://esty.ancients.info/interesting/SECVRITAS.html Comments and suggestions are solicited.
Pretty simple and to the point. I only have one coin with that god. Tacitus (275-276 AD) Silvered Antoninianus O: IMP C M CL TACITVS AVG Radiate, draped and cuirassed bust right. R: SECVRIT PERP Securitas standing left, leaning on column. Ticinum mint 4.42g 22mm RCV #11812, Cohen #131, RIC V (1) 163
Doug's question about when the meaning of "SECVRITAS" changed led me to make the site more thorough and informative with more coin photos and more commentary. Take a second look at it. http://esty.ancients.info/interesting/SECVRITAS.html