Nexen Horton 5/8" Air Champ Clutch Brake air champ

Nexen Horton Air Clamp Clutch Brake air champ bore and shaft 5-8" can't make out the model I possible see  JAR2550.825  0AP 255 0.625 00022?55 see pics for more info Condition: used good working J(1) 25# 2-6-19