No. Actually, the first examples were produced on special order from the New York State Police and they were marked Model 10-6. That was the genesis of the Model 13-1. Other departments, including the FBI, heard about the .357-chambered Model 10-6 and expressed an interest in purchasing them. S&W's response was to produce them under a different model number and the Model 13-1 was born.
SWCA #2475, SWHF #318