Professional Use Knoll Business Bag - Rare!

This is a brief bag that furniture maker Knoll distributed to professionals.
It is not generally available.
It was a novelty item given as a gift to a very limited number of heavy users.

Size: W460mm H350mm 450mm (including handle) D60mm
All measurements are approximate.

I obtained this bag from a Knoll sales representative about 35 years ago when I worked in the industry (major architectural design). At the time, this bag was famous in the industry, and many people wanted it, but only a few designers could get their hands on it, making it a highly coveted and rare item.

Knoll fabrics change every year, and this year's fabric is a subdued gray plain weave woven with a variety of yarns, which I have used for a long time. (My friend had a bag in a vibrant orange color.)
The handle has been repaired in some places because it was torn. The inside is pigskin with two pockets. There is some age-related soiling, but it is still usable.
At the time, it was difficult to find bags that could hold A3 size documents, so it was useful for carrying drawings and presentation booklets. (The white paper in the photo is A3 copy paper.)
This is likely a vintage collection that is hard to find now.

Knoll is a furniture brand founded in New York in 1938 by Hans G. Knoll, the son of Walter Knoll, a famous German furniture merchant.
https://www.knolljapan.com/

Owning this is a valuable item known only to those in the know.
Please, for those in the know.