Sears 75-260mm f/4.5 MC Close Focus - Sample Images
Info and Reviews:
Introduced: ??
Optical design: ?? elements in ?? groups
Lens mount: Pentax K and probably more mounts that was popular at the time.
Covers: Full-frame (24×36mm)
Info / Review:
http://www.pentaxforums.com/userreviews/sears-75-260mm-f4-5-close-focus.html
