BBE wroteI was at the Post Office Lock Shop in Washington, DC about 3 years ago and in the bottom floor they still make those counter locks.
The Mail Equipment Shops (MES) at 2135 Fifth Street, NE, Washington, DC, was also the location where most of the rotary locks produced for the Post Office Department and other federal agencies were produced. During the past century at this location, the MES has alternated between repairing rotary locks, making new and fixing defectives, or only manufacturing new ones. These shifts have been driven by the postal budget for a given fiscal year and the changes in management perspectives about the cost-effectiveness of repairs versus new lock production.
At present besides the rotary locks, the only items produced at the MES are the “Arrow” locks and keys which are installed in street letter collection boxes, “modified Arrow” locks and keys which have a Medeco cylinder, “serial” locks which are the brass padlocks using a push-key that are marked “street letter box,” and the keys for postal lock boxes.
As a postscript about “rotary” locks (marked "U.S. REG’D MAIL): about 1,000 seemed to have been produced as a test of outsourcing around the 1940s although no firm information has been found regarding the year. These were procured from Sargent & Greenleaf and had the same keying as a standard-use rotary lock. They are distinguishable by having the serial number prefix “BB,” the guard over the rotary window having four cut-outs (an opening for each of the numbers), and a peened top edge of the case around the shackle collar casting.
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Rob wroteI’m going to attempt to impression a key for one of these [rotary locks].
Be cautious in attempting to fit keys to postal locks that are not obsolete and considered to be in active use by the Postal Service. Despite what you may see listed on eBay regarding fitted or original keys, there is a federal law that prohibits producing a key that will open these locks. I can send a copy of that law as an email attachment upon request.
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