Chair ID - Is this Yngve Ekstrom ?  

Thanks @lexi I thought AV was the mark/producer

@wesemael. " AV " is possibly a store/ shop ?

@lexi the uder text is marchio depostato

@wesemael. Translates to "registered Trademark"

@lexi @wesemael  It looks like there was an Italian company called AV Arredamenti Contemporanei.  Most of the products you can find online are wall units like the one shown in first photo.  The second photo is a desk sold at auction and the label that was on  it.  

thank you @mark737 found those to a lot on VNTG I did not find any info on the company itself adres/mail  To ask them about the "not" ekstrom chair Following this tread with reference to the sticker by @tchp

with the help off VNTG  

@wesemael.  Nice find.

I saw the A. Viotto name as well.  This AV Arredamenti Contemporanei wall unit listed by an Italian dealer had an A. Viotto tag on it as well.  I tried to find some info on the company but didn't find much -  a record of a mortgage in 1933, and a company reorganization in 1975.