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In 1870 a further reorganisation, ostensibly to simplify management, resulted in the MSD, MSC and MSSC being grouped with the Army Service Corps (ASC) under the Control Department.
Sprenger developed the PIC Handbook together with Bobby Krishna (the Senior Food Studies and Surveys Officer with the Food Control Department of the Dubai Municipality.
He worked in the music industry for several years, first in the quality control department of Decca Records listening to output that ranged from medieval classical music to Chubby Checker, after four years becoming assistant producer to Tony D'Amato, then briefly a record plugger for Pye Records.