Help identifying lenses

[GhengisKhan]

I just came into possession of 2 lenses which I cannot use and am considering selling them. My current setup is Nikon, and I believe these lenses are for either a different type of mount, or for some type of Cannon, as they do not fit on my camera. I've tried doing some research, but came up empty. I was wondering if you people here could help identify these lenses for me. Model numbers would help me figure out what they might be worth also.

First is a Sigma 100-300mm


Second is a Sears 80-200mm


Any help would be greatly appreciated.

 

[modi123]

By the looks it is old Sears 35 mm camera lenses.

Example:
http://www.ebay.com/itm/Sears-Multi...d=172668726784&_trksid=p2047675.c100011.m1850