Victor Special was the Trade Brand Name used by Crescent Fire Arms Co. and distributed/retailed by Hibbard Spencer Bartlett of St Louis, Mo. Was headquartered in Chicago. Probably had an outlet in St Louis.
If you are speaking of the single or double barrel guns, you can change barrels. However, you should have a gunsmith look at the other barrel to make sure it fits properly, most of them need a little hand fitting.