An email issued on 10 Nov 2020 by the American Philatelic Society announced that there was a theft of valuable stamps from a dealer in Walnut Creek, California, USA:

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"STAMP THEFT ALERT
URGENT: Walnut Creek CA Theft

Merle E. Spencer reported a theft that occurred on Thursday, November 5 between 4:30 pm – 6:00 pm. from his store at 2678 N. Main St., Suites 1 & 2, Walnut Creek, CA 94597.

The items stolen were the three most expensive plastic binders of his material. Each of the three binders was about one inch thick and included 20-23 Hagner pages.

The most valuable volume, approximately $150,000, consisted of United States material. A second volume was of Great Britain material beginning from number 1. The third volume was his second volume of British Commonwealth covering Hong Kong to Z.

Mr. Spencer has colored photocopies of most of the U.S. items stolen.

Officer Villa of the Walnut Creek Police Department took the report of the theft. The report number is 2027-743.

SHOULD YOU COME IN CONTACT WITH ANY OF THIS MATERIAL, PLEASE CONTACT:
Your local police department
The Walnut Creek Police Department at 925-943-5844
Mr. Spencer at 925-944-9111
The APS Stamp Theft Committee at stamptheft@stamps.org

American Philatelic Society
100 Match Factory Place
Bellefonte, PA 16823
Phone: 814.933.3803"

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This is a map showing the location of the reported theft.
https://www.bing.com/maps?form=MOZCON&pc=MOZI&q=2678+N.+Main%20...%20C+CA+94597