sunburst seals

[Mike Roberts]

Peter.

I don't know about the date but was interested in the two receiving marks on the back. The earliest is to Terminal Annex in downtown Los Angeles. This tells me the letter was passed through the airmail gateway at LAX without being backstamped. Rather was processed at Terminal Annex then passed on to the local station, a few mails away and in the Heart of Pico Union.

My two  cents. Took a day to move overnight less than three miles.

[Mike Ludeman]

I took a quick look through some of my registered covers with the Sunburst Seals, and found the following quantities by year in the 1960s:

• 1960 - 12 total
• DF, Mexico, Airport - 4 covers Jan 11 thru April 18
• BCA, Mexicali - Feb 29
• NLE, Monterrey - 2 covers, Mar 1 and Mar 9
• COAH, Saltillo - Mar 7
• JAL, Guadalajara, Sucursal B  - Mar 1
• TAMP, Ciudad Miguel Aleman - Mar 5
• VER, San Andres Tuxtla - Feb 20
• SON, Navajoa - Feb 19.
• .
• 1961 - 1 cover
• SIN, Mazatlan - June 26.
• .
• 1962 - 2 covers
• SON, Hermosillo - Jan 6
• DF, Mexico, Admon 45 - Dec 11.
• .
• 1963 - 1 cover
• SLP, Ahualulco - Feb 27
• .
• 1964 - NO Examples.
• .
• 1965 - 1 cover
• VER, Jalapa - Aug 16.

I have not Typed all the Seals, but on casual inspection, they appear to be Follansbee Type 22, which he noted was used between 1949 to 1962.  Of course, this only means my collection may be skewed, and there are other such 1960s cover usages out there.
I'd be interested in learning of any others that might be in MexiMail reader's collections.  Please contact me or post an image in this thread.
Mike Ludeman

[Mike Ludeman]

Peter,
In the Follansbee monograph, I "think" the latest date he ascribed to a usage was 1962 for several of the later red seal types.  I have encountered only a few registered letters with seals dated in the early 1960s.
However, I do have the cover shown below dated May 30, 1973, which is the latest usage in my collection.  It is a Follansbee Type 24. 
It is certainly an anomaly, at least from my examination of several 100s of these registered covers with seals.

[Peter Bamert]

This seems to be a rather late use of a SBS on a cover. Does anybody know until when they were  used?