I took a flyer and picked up a Martin Indian trumpet. I own a 1946 committee and understand that the indiana is a student horn and the heratage. The Indiana was cheap and in very good shape. The bore size is .468 roughly. I did not know if it was standard for these to be larger bore horns. Very little info on the subject on the internet. The finish is like new. I suspect the horn is from the mid 60's but cannot find any serial number data anywhere. If anyone could offer some input about this model it would be appreciated. Thanks!