Welcome to the forum. You will enjoy it, but it will cost you a lot of money when you get the S&W fever.
Your serial number range is 1973- 1974.

The 2 inch model 10 was made in a square grip and a round grip. The round grip is best for carry, but the square grip fits my hand better for shooting.

Good luck with your purchase and post a picture if you buy it.
Randy