Mine has a bluish front element and came with a paper certifate from V1 studios cetifying that it had been modified. No other filters came with it.
I purchased it some 12 years ago directly from Zone V1 it was quite a bit more expensive than the standard non modified Pentax version but its worked perfectly every since and has had very hard use. Check out Fred Picker's Zone V1 book (can't remember the exact title) as it has some useful info. Personally i always set my brightest hightlight meter reading that i want to print at zone 7.5 on the paper sticker dial and expose and process accordingly.
good luck with it.