Thanks John,Might be some model of pistol produced by Bestegui Hermanos based on the monogram. Spanish maker producing firearms in the early 1900's till I don't know when. I think they are still in business making bicycles. They were one of the many makers of the Ruby 32 auto used in Europe in the world wars. I think they also made Broomhandle clones at one time.
No other markings on the revolver. Very old and in bad shape. I was curious since it wasn’t S&W. John steered me the right direction.There are no other markings? A lot of manufacturers back then.