Thanks! The lock up and timing is spot on.

I found some information about this as commented below...

The Rossi 88 Stainless Revolvers introduced ~ 1992 by Interarms. Interarms collapsed in 1998. Manufacturer was Amadeo Rossi S.A. of Sao Leopoldo, Brazil. Importer was Mr. Sam Cummings at Interarms, #10 Prince Street, Alexandria, VA. Construction is entirely stainless steel metal. Type is double and single action revolver, with hammer nose firing pin and transfer bar internal safety device. The Rossi 88 is a direct descendant of the classic Smith & Wesson model 60, .38 Chief’s Special Stainless. Barrels are one piece six groove right hand 1:18.75 rifling. Cylinder is chambered for .38 Smith & Wesson Special caliber only, and capacity is 5 rounds. Trigger is .312 stainless serrated face, with matching .415 semi target short serrated spur hammer.

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