Ametek Lamb 5.7 inch 3 Stage B/B Tangential Bypass 24 Volt Vacuum Motor 116515-13. 

5.7 Inch Diameter 3 Stage Double Ball Bearing Motor with Horn, 24 Volts. 

24 Volts, DC, JF6. MODEL-VAC 5.7 24V 3 STG BP T/D B/B. 

Manufacturer Part Number: 116515-13    

L-116515-13    

SC-05-8523-06