This is a Black RH Logic 300 Office Swivel Desk Chair 
Fully Adjustable. Seat Arm and Back height adjustable. Seat and back tilt. Arm width adjustable. 
The Chair is missing the lumber air Pump. These can be purchased from around £12 if needed online 
This is a top Quality Chair that costs around £850-£1000 new  
All functions work as they should. The chairs condition is fully fit for purpose. There are marks on the arms and the back of the backrest. Well padded seat and fabric back only have very minor odd marks. See last picture 
Overall brilliant Chair that with a good clean would bring this chair to looking great 
Please look at my other commercial items