There are at least three artists with the name Captain.
These are photos from concerts where Captain played, so they may be of other bands that played the concert as well.
America / Captain May 10, 1975 Johnson City, Tennessee, United States Uploaded by Zimtrim
America / Captain May 2, 1975 Passaic, New Jersey, United States Uploaded by Zimtrim
America / Captain Apr 27, 1975 Kent, Ohio, United States Uploaded by Zimtrim
America / Captain Apr 16, 1975 Normal, Illinois, United States Uploaded by Zimtrim
America / Captain Apr 15, 1975 Bloomington, Indiana, United States Uploaded by Zimtrim