1981 stubben jumping saddle?

I have an older Stubben(about 30 years old) that I am trying to sell. It's been in our family for two generations, and looks great. I'm sure it was made around the year 1981, does anyone know what Stubben it is?? It's pretty plain, havana brown with no knee padding, just knee rolls. I want to know the name so I can put it in the add. If anyone knows, that would be great! Thanks.