Apollo Service Module Primary Oxidizer Tank. A titanium oxidizer tank approx. 28 in. tall and 12 in. in diameter with Bell part number 8271-471036-11 REV. "J", serial number 133, and inspection stamps. This tank supplied the nitrogen tetroxide oxidizer to the reaction control system engines of the Service Module. [With:] Two-page descriptive text on reaction control system. (2)