DIAMOND VALUED AT $3,500 AND $150 IN CASHTAKEN* (By The Associated Pre$«PAMPA, Texas, Dec. 20. — Twoarmed men robbed Dr. V. E. Von Brunow, pioneer Pampa physician, of a diamond ring valued at $3,500 and ! $150 in cash in his apartment above a downtown store on Pampa’s leading business street tonight,; Dr. Von Brunow and his wife w*ere eating dinner when the two men I knocked at the door and asked the physician to write them a pre-j scription.When the door was opened, the | robbers ordered Dr. Brunow and his