1960s Crane Team Buttons
 

Hi, I need some assistance or confirmation from those of you who are pin/button collectors. I apologize if this has been covered in other threads.

I am mainly card collector but I do have some pins/buttons. I was looking through my collection and found 3 pins which I believe are Crane's.

They all have a RED crane stamped on the back. There is no year stamped and I am interested in knowing what year they were issued. I did some research and found that some Crane's have a year printed. But, many don't and some have difficult colored Cranes.

Can someone confirm that those with the RED crane are from 1968? Or am I mistaken. I think there are a couple of other colors, such as ORANGE, but those were issued a different year.

Thanks.