MRC:
The number used by the manufacturer for identifying the item.AQGB
Manufacturer Identifying Number:
Royal portableand manual models 5, 6, 7, 8, and 9, scm portables, manuals above serialnos. 5, 500, 000, and electrics above serial nos. 6, 100, 000 and underwoodmanual except model no. 150 and noisless and portables
MRC:
The name of the manufacturer of the machine for which the item is designed.BZJK
Machine Manufacturer Name For Which Designed:
Royal typewriter co., division of littonbusiness systems, inc., smith-corona-marchant corp., underwood corp.