The 1971 half dollar has a master die for P,D,S. This die was used in 1971 and 1972 witch made is series doubled. The die also has the ODV-003 (strong R). The CONECA description is, light spread on last 1 of date and Y of LIBERTY with rotation on I of IN, TRUST, and E and T of LIBERTY. Yours does not match the series doubled half, yours is the ODV-002 (weak R). Yours seems to me has having very minor doubling.