At that time Karnataka exp 2days a week run via sc as 127/128 and 4 days a week via Bza and R as 927/928 (see pic no 1) and once a week via Dhaund solapur (present route) as 905/906 (see 2nd Pic)
Later Karnataka exp starts to run daily via daund permanently as 127/128 scrapping rest.
Photo taken from an 1987 SER...
more... timetable: an abstract time tables of selective express trains