What do you guys think of this lens, the CALTAR II-N 300MM (f/5.6, 7 aperture blades)? Is it the same as the Caltar listed on the old lens section of this site:

Calumet Caltar II
E/G: 6/4
F: 300 mm
Maximum Aperture: f/5.6
Cover Circle: 425 mm
Price: $900
YR: 2

If so, I might be interested. Seems to have a large coverage circle (more than 2x 4x5's 163 mm diagonal), and it's relatively large maximum aperture.