Nice, that should do well

Yea

One of my favorite model, but without tuner pack this unit...

Yes should do very well. Although I am pretty sure he is incorrect calling it a JDM Japanese Domestic Market only model.  AO you can confirm the WM-40 was sold in EU as well as Asian markets?   JDM models would have all Japanese character markings usually or the sticker that my WM-40 with CTP-1A Tuner pack has in Japanese characters.  He is right the WM-10RV was US and Canada model and to my knowledge never came with FM tuner pack.

  Since it is not a tuner pack model this could be a EU model.  

Yep, looks similar to EU WM-40's

Was purchaised in Japan, so it is JDM Original

just without tuner pack, it was sold separatly, so did not have it at that moment

just check those photos 

I think for EU market no japanese letters on bat cover and no embossing on back side

correct me if I'm wrong

The EU version does have the embossed text but obviously not the Japanese text. Don't get me wrong, this is a great auction for a great product but surely yours is just a WM-40 that was sold in Japan rather than a JDM-only model, e.g. an iPhone sold in Japan will be in a box with Japanese text etc which I can't help thinking doesn't neccessarily make it special apart from the fact that it was the one they sold in Japan, if you get what I'm thinking?

Sure it can be

But what I mean JDM is not only japan market it is FROM that market

For example cars: subaru STi EU and JDM is huge difference between models, but same names.... If you buy car from japan it will be better quality and many options, and main conclusion for japanese they make better products... It is only my opinion... But with my own experience.