Model Catalog: 2704-3-018 (Lot serial: >10 lot numbers contact mfg); Model Catalog: 6703-1-018 (Lot serial: >10 lot numbers contact mfg); Model Catalog: 6704-1-018 (Lot serial: >10 lot numbers contact mfg); Model Catalog: 6704-3-120 (Lot serial: >10 lot numbers contact mfg)