Crystal Wine Decanter

I inherited this crystal wine decanter from my aunt. Her husband puchased in 1961 for there 1st year anniversary on rodeo drive in Hollywood ca when they lived there   This  was purchased in an expensive jewelry store. I don't know how much he paid but was told it was more expensive than a diamond. This is not cut glass there is a lot of detail   I do not see a marking like Waterford crystal or anything. I understand the markings of whom or where it was made would be hidden can u help with with the value   I have 3 other aunts that want this piece and it caused a family dispute so I know it is valuable