Help to authenticate Herman Miller EA220/EA420 exec Soft pad  

All appears correct to me.

Thanks for your comment tktoo2, i just thought the base looked moody as its very different to others i see online, more rough! Appreciate the response though.

@ollie9swy, When you write "base" do you mean the (painted black) tilt mechanism? I've never seen one with the welds ground smooth. The welded joints on vintage Herman Miller chairs have always appeared more-or-less similar to your example.

The only potential problem I noticed in your photos is that the plastic(?) seat post bushing has come loose from the hub of the base and may need replacement. These are available from various vendors and are considered a normal wear part (as is the torsion bar inside the tilt mechanism).

Edit: I looked again at your photos and some of the welds are indeed less pretty than others I've seen though apparently still solid and I think likely original. It's possible that they are evidence of repair or maybe just that a new apprentice was on duty that day.

Hi, yes I’m referring to the tilt mechanism, everything works as should just looks as you said grounded down, so I wonder whether it’s a replacement/ repair. Thanks for taking the time to examine the photos 

@ollie9swy, Please see edit above.

And welcome to the forum!