Scio Hazel Sugar Bowl how old is this particular Bowl

I love the Scio Hazel pattern we had these when we were children growing up in West Virginia.
What an old pattern I find these occasionally the sugar bowls usually without to Lids can anyone tell me how old this bowl is. Or refer me to a site that specializes in dating Scio Hazel patterns This one has no USA embossed mark on the bottom

 

https://www.replacements.com/p/scio-hazel-sugar-bowl-lid/sc_haz/6573781
This seems to match, but I’m not positive, they don’t show the side, but if you start on the link below it seems to match.
I started here, if you want to look at them,
https://www.replacements.com/webquote/sc_haz.htm

 

I don't see how you can date it; Hazel seems to have been made well into the 1970s--http://www.laurelhollowpark.net/orp/scio.html

 

Thanks JanetpJohn I was wondering when did they start to emboss the back of the bowl USA or was it the other way around when did they stop ehmbossing the back of the bowl USA