How to date Sacred Treasure and Order of The Rising Sun medals?

[Materia]

I had both of these, but I sold them. I also had Red Cross medal, and I sold it too. Does anyone have any idea how to date them, how to tell when they were made? I try to collect only awards that are connected to war period [World War 2], or earlier. It made me very unconfortable to own something, that I have completely no idea if it is from the past, or a current, modern one.

Red Cross.

Edited September 8, 2017 by Materia

[JapanX]

Both orders were issued somewhere around 1970s.

[Materia]

Would you advise me what to look for when buying them? How can I be sure to get pre 1945, and earlier.