I am an adoptee from Nov. 1969 in Medford, Or.
Records indicate that my Bio Mom was from the Portland area.
Additionally, they say that I was her first child, but at some later time, after my birth but before spring of 1970 the state worker found some evidence of a female born the year before from the same Bio Mom in or around Portland.
I have a state ID# for the questionable adoption from 1968, somewhere in my records.
One additional thing was the listed height in the non-identifying information, from the state, listed Bio Mom as 6'2. and if memory serves born in 1949.
Maybe this helps, or maybe not.
Good luck
Bill