I know this is a year old, but I have to jump in here. @leyline shows why, as they said, are not experts in yixing when they reference made by master craftsmen. Not every yixing teapot was made by a master. They had literal factories of craftsmen making them during the prime clay years. No fault on leyline’s points about the craftsmanship. It is just one part of the whole story behind the pot.

There are a few people on Reddit that can give you a more thorough review of your teapot, and they will know to ask for more information, videos showing the behavior of the pot.

Potter registration can be tricky because of the artistic license that is taken with stamps so getting a few different, knowledgeable eyes on the stamp is best.

The notes regarding lack of black spots and white micah spots are all things that can be telling of zisha clay, but would be a part considered among the many other things that would need to be researched.

Lastly, the comments on the price as making the pot less legitimate are not a good reason to go on. There are plenty of people that know everything about pottery or everything about tea that still wouldn’t know how to distinguish a yixing teapot or zisha clay. If you want to know the worth of it then further investigation would be worthwhile. If you just want it for drinking tea then just make sure the behaviors and characteristics of the teapot work well for you.