Wista 4504

[ad1965]

Dear all,
I have the chance to buy a Wista. The seller called the model "Wista 4504". However, I am a bit confused about the model name. On the Wista homepage I also see the name "Wista 4504". But in all articles and forums in the internet I cannot find this description. It is either "Wista SP" or "Wista VX".
Is the Wista 4504 equal to VX and a 4502 equal to SP?

Thanks in advance!

Axel

[Bob Salomon]

The 4504 was the VX and the 4502 is the SP. The RF is 4501.