http://www.gdc-japan.com/index.html
(in Japanese)
Via: http://article.dcview.com/newreadarticle.php?type=0&id=10483
(in Chinese)
The red green marked circles are somehow like the design of the K-01 for its top buttons and so does the overall black/silver colour scheme. Besides, they have some other lenses, but unfortunately all of them are add-on type. :-(