I picked this up from a seller in Russia, because I like mud shaped like CD 154's, and foreign mud in general. I was surprised to find that it had North American-style threads. It's 4" tall, 3-1/2" wide, and has a MLOD. It's also marked with an incuse "23"... the 3 is clear, not sure if the 2 is a 2. What do you think about this one?