Up for sale is a gently used vintage Sigma lens, model Zoom-K II, serial # 1006075. Lens made in Japan.

Specs: 1:4.5 ,  f=  70-210 mm with Macro. Fitting: Olympus OM system.  

This lens can be used on digital Olympus Four Thirds E-System DSLR Cameras with Olympus OM Adapter MF-1 (not supplied) 

The Multi Coated lens is in excellent condition, and comes with both caps in original "tube" container.

Note from Olympus web site ,(https://www.olympusamerica.com/crm/oneoffpages/ask_oly/crm_e_ask_oly_04_11.asp) :

Olympus OM-System lenses and lens accessories can be used on Olympus E-System DSLR and PEN digital cameras when mounted with the appropriate adapters. To mount OM-mount products to an Olympus Four Thirds E-System DSLR, you will need to use an MF-1 OM Adapter.