n October 2012 Spanish Ebay seller jvs.es was selling these Spanish administrative and technical (TA) and International Organizations diplomatic plates. They have been made in a plate shop in Spain and they are not even the correct design. Probably best to call them fakes rather than made-to-order specials as they are wrong.
There are lots of mint Spanish diplomatic plates available that have been made in plate shops and have never been near an embassy or an embassy vehicle and quite a lot of them are the correct design unlike these.
You have been warned – don’t buy mint Spanish plates.