Your gun was made after 1977 when the -7 came about. Model 10s Military&Police, are very common as they made multi-millions of them. Yours is probably worth $200-250. I'm sure you have been told they are the wrong grips on the gun.
Give us the serial number with the last couple digits Xed out and we can tell you when it was shipped. Serial number is on the butt of the grip frame, you need to take off those grips to see or open the cylinder and it's stamped near the Model number. Enjoy!
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Dick
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