I was amazed to see this post for the Monitor vacuum. I had a friend back in the 1970's that had one of those vacuums. The bag was large and half black and half white to beige. I really liked it and when he told me he was moving, I said the I would like to buy it from him, but he already gave it to his sister. It was one of many old vacuums that I had seen in my early years that eventually got me into collecting cloth bagged uprights in the 1990's.
Edward