Name brand "POLAR" is a korean company known as "Samyang Optics.".
They products Samsung SHD and D-Xenon(for DSLR) lenses (OEM).
My Polar 35-70mm f3.5-4.5 lense was produced since 1985. (not exactly assurance)
There is no A connecting point. but it works well on Pentax P3 photo sensors.
Sample pictures will be published on my blog.