Need more numbers, there were a lot of applications for the MJA model.
The only thing on the tag is MJA-C. There are some casting numbers on the bottom that read MJ HG-1, and seperately a 14.
With no application number it is probably a universal replacement for a failed unit that would have to be configured to match.
Just to many combinations to figure out the hard way.
The MJA came in editions A,B,C,D. and either base mounted or verticle flange and with or without impulse coupling plus many timing variations. Also covered 1, 2, 4 and 6 cylinder applications.
Used on Case, Cat, Waukesha, Le Roi, Hercules, Continental and many other lesser know units.