Before revision: SNAP-19 SNAP-19 (B) was developed for the Nimbus-B satellite by the Nuclear Division of the Martin-Marietta Company (now Teledyne Energy Systems).
After revision: on a Pioneer 10/11 replicaSNAP-19SNAP-19 SNAP-19 (B) was developed for the Nimbus-B satellite by the Nuclear Division of the Martin-Marietta Company (now Teledyne Energy Systems).