Hi George,
I did a little research on your question, and finding an answer seems near impossible. From what I have found, it is definitely not a Loree (unfortunatley or not, however you see it
). I looked over this site, and I am not seeing any numbers that resemble yours
http://www.musictrader.com/serialnos.html Is the number legible enough to confirm SO22? It might just be an oboe by a small maker or an offshoot brand of another company. Whos knows. You might even want to try contacting respected people in the oboe field if the mystery is driving you crazy.
My feelings are, if it plays well, it doesn`t really matter who made the instrument. Hope this helps.