Rossi Revolver

I bought a used Rossi revolver and was wondering if I could get some help identifying the model number. A previous owner cut the barrel down, so there is little writing still on the barrel. It is a 38 SPC, it was made in Brazil and it was imported by Firearms Int'l Corp. I was thinking it might be a Model 68 or 88? Serial number is 5 digits starting with 19. The front sight is gone (looks like someone might have replaced it after the barrel was cut, but looks like it sheared off). The cylinder is very difficult to open.

Thank you in advance.