[Proj] Krovak again

[Irwin Scollar]

The Czech GeoPortal site:

http://geoportal.cuzk.cz  (COSMC)

shows positive coordinates (Krovak) increasing to the south and the 
west when the mouse cursor is moved over a map or an orthophoto.

A map area centered on Prague on the COSMC site automatically shows 
the bounding box coordinates as negative numbers in the search field 
of the web browser.

http://geoportal.cuzk.cz/cuzk_wmsklient/Default.aspx?CRS=EPSG:102067&variant=ortofoto&BBOX=-826324.245856,-1224934.494271,-713435.417927,-1140267.873324

The national Inspire Czech Geoportal site shows negative values 
increasing to the south and west in the lower left corner on mouse movement.

http://geoportal.gov.cz/web/guest

Which Krovak variant shown in OGP Publication 373-7.2 p 25ff is 
involved here or is this yet another variant?

What is EPSG 102067?  It's not in the EPSG database.

Irwin Scollar