Hi,
Pentax made both 6x7 and 645 medium format cameras as well
Here is a brief part of their history relating to the Pentax 67.
"In 1969, Pentax introduced the 35, 55, 75, 105, 150, 200, 300, 400, 600, 800 lenses labeled "Super Takumars." 1971 saw improved lens coatings and a name change to "Super-Multi-Coated Takumars." The 90 LS, 135, 500 and 1000 lenses were also added to the line.
Are yours for a 35mm K-mount....?
Best,
Steve