Here is a Pentax K-7 Silver camera with my A*300/2.8. This lens is still light enough to use handheld, but it is a heavy lens at 3kg. These lenses were available via special order from the mid 1980s through to the end of the 90s.
A3002.8K7 SilverPentax a300 2.8
From Pentax A Star Series Telephotos