Flickr still, unfortunately, has horribly messy data for any Pentax camera. Their stats, specifically in the flickr
Camera Finder page, started to get confused after Ricoh took over Pentax, and have stayed that way ever since.
For example they show the K-3 II under Ricoh,
Flickr: Camera Finder: Ricoh: IMAGING COMPANY, LTD. Pentax K-3 II
but the K-3 is under Pentax:
Flickr: Camera Finder: Pentax: K-3
and while the K-3 stats summary initially shows '# of items - 0' for the K-3, when you look at the actual K-3 camera page you see lots of K-3 images and "2,634 uploads from 162 users yesterday"
Plus the flickr
Camera Finder page still doesn't show the K-1 anywhere, for example, either under Pentax or Ricoh. Nor the 645Z or 645D, for that matter.
The Camera Finder page and flickr's EXIF parsing code clearly needs some work.