I am currently using the CP-93 with my N73. I bought the case in Singapore at SGD22 (about USD15). Is fully leather in brown colour as shown in the picture above.
The case fit very tight in the beginning of usage. I believe after 2-3 months of usage, it will get loosen to Just Nice fitting.
Just through my experience of using Nokia casing over the years, the "velcro" (the closing of the casing) is not very durable. After one year of usage, it will get loose - this mean the case will not close very tight. However, the quality of the leather is superb, no doubt.
Another comment for the CP93 is that - it is not very convenient to charge your phone while the phone is in the case itself. The bottom of the case is not designed to allow the charger port to be exposed clearly - i.e. there is no dedicated hole in the case for you to plug in the charger. You need the adjust the case so that it is opened a bit in order to charge the phone. Hard to explain - but I believe you get the picture
Also there is no way to use the pop port while the phone is in the case itself.
So I kinda regret using the casing but I like the design and the quality of the leather so it is up to you to decide. My opinion is not to use this CP93 for the N73.
Try to get another casing - other brands (also fully leather) which is designed for Nokia phones. Make sure there is some dedicated opening for the charging port and pop-port for the N73