Thanks again. With this information I can update the website. Do you know the periode the Algerians used this roundel?
No, unfortunately, Gerard, I can’t help you.
All I know is that striped roundels were used on aircraft since the Independance (Mig-15 on B/W pictures are stationed on a Libyan airfield, pending their arrivals), but I don’t know for how long.
PS : since we are on the Algerian issue, have you note the thin blue circle outside some algerian roundels ??
without : 
with : 