This lens is a high performance zoom from the Tamron S P series.
This series stood for the best quality when the lens was launched. 

It was built in the period from 1982 to 1990.

The technical specifications of this 5x zoom read excellent and indicate good workmanship.  

And indeed, neither metal nor glass was spared here.  
Moreover, all markings are engraved and filled with paint - this not only looks good, but is a high-quality and durable process. 

The lens weighs 875 grams, is 161 millimeters long, its diameter is 68 millimeters ] - both without adapters. 
15 elements were installed in 11 groups. 

The smallest available aperture is 32, this is formed by 8 aperture blades. 
Screw-in filters require the size of 62mm.  

The shortest setting distance is 1.9 meters.  A macro option is also available, allowing a maximum magnification of 1:1.55, an incredible value for a zoom lens!

Tamron lenses were not built with fixed mounts for a specific camera brand. 

For each lens, the customer still had to purchase a "Tamron Adaptall 2" adapter for connection to "his" camera. 

If the photographer owned a Canon A 1, a "Tamron Adaptall 2 Adapter FD" had to be purchased accordingly. 

If the photographer had a Minolta X 500, a "Tamron Adaptall 2Adapter MD" was needed.  

Tamron offered special adapters for almost all camera brands. 

These were simply attached to the respective Tamron lens and took over all the functions that an original lens of the respective camera brand also offered. 

Of course, the adapters could be exchanged by the photographer himself at any time, so that different cameras from different manufacturers could be used with the same lens. 

Of course, this still works today!

Ingenious, isn't it?