Front has three knobs on right side alligned vertically. Back has two knobs alligned horizontally that read "V. Size" and V. Hold" respectively. Back metal panel reads "Manufactured for IBM Armonk, New York S/N 0937656 Model 5153 LISTED EDP Equip 17J3 60 HZ 120V~@0.95A FCC ID Bjm9UBM5153 Made in Taiwan, R. O. C.
