The following is the Official Japanese PPG (Pentax Photo Gallery), it once shown the name of K-3, together with the name of the "K-5 series", for photo submission under the same camera category! :-o
Via: http://www5a.biglobe.ne.jp/~hu5150/dcl/camera_news/article/pentax/2013/0922_01.html (in Japanese)
Well, the picture was shortly deleted and reverted back now, where only appears the name K-5
