I have a martin indiana elkhart saxophone, thats all it has ingraved on it besides the RMC crest and the sn on the back not sure if it is fron the 1928 or the 1961 does any one know about these saxophones, here is a link of some photos.
www.paintedspirit.com/saxaphone.htm
That's a student model Indiana (which was a seperate division of Martin) from the 1960's. These horns are significantly different from true Martin saxophones, an d should not be confused or considered equal.