That is a nice .22/32 Kit Gun. It is the J frame version and was probably produced in 1977. I'm not sure why you added that asterisk, but there cannot be 6 digits after the M, beginning with a 9. The M series never reached anywhere near 900,000.
I personally like the Kit Guns a lot, as does my wife. Together we we have several. Yours has the square butt. They were also produced with round butts. Here are a couple RB Kit Guns. The nickel 4" is a 34-1, the blued 2" is a Model of 1953, from before there were any model numbers.
