Yes it's an interesting bunch. Almost 100 covers. There are a number to the Ringling School of Art (not sure if it's connected to the circus, but is still running today) and many are addressed directly to Mr Kaiser, including Magazine of Art.
Also lots to Travelers Insurance.
The late collector, it was an estate sale, had created an interesting collection of stamps starting from 1940 (starting with SC#889) and showed each stamp in progression through the catalogue, on covers. Each cover was labeled with the catalogue number. Unfortunately he more than occasionally wrote the number directly on the envelope, very boldly in ink.
But an interesting lot just the same, including what I'm calling the Augusta collection, shown on another thread.
Here are a couple more.
A neat airmail. Sent from one fellow in St. Petersburg Florida to another fellow in St. Petersburg Florida, but postmarked in Staten Island NY.

A normal looking cover to the insurance company, but the date slug is upside down.

