Scientific Columbus. Type SC10. Ser. No 0008511. Model 6374 , Kh=0.6 wh at SA, 120 V, 60 Hz.
Scientific Columbus. Type SC10V. Ser. No 51678. Model 6374V , Kh=0.6 wh at SA, 120 V, 60 Hz.
G & W Electric Co. Cat No. VRA21-376M-40PI. Serial No. 625-97-0362.
Sangamo. 120/240/480 V. 1-5-12.5-50A 50/60 Hz. Basic Kh 0.6 (SA 120V) Cat # 9092000-000 Serial # 8848006
Basic Measuring Instruments Ser # 35227