R.L. Dun & Company

Apartado (Post Office Box) 40, Mexico City

This firm produced perfins from 1903 to 1915.

Here are two R.G. Dun & Cía covers produced in that time:

Dun SASE

Unused Self-Addressed Stamped Envelope
DUN perfin on 5 centavos Miguel Hidalgo definitive (1910) - Scott 314
DUN cover

Used 10 June 1913 with DUN perfin of 5 centavos Miguel Hildalgo definitive (1910) - Scott 314
Also shown is the letterhead of the contained letter. This letter was signed by Edwin Sours, Gerente General.

Here are some of the stamps which have Dun perfins:

Dun 1903 perfin   Dun 1903 perfin   Dun 1903 perfin   Dun 1903 perfin   Dun 1910 perfin   Dun 1910 perfin   Dun 1914 perfin   Dun 1914 perfin   Dun 1914 perfin   Dun 1914 perfin   Dun 1915 perfin  

Edwin W. Sours
Edwin W. Sours, General Manager of R.G. Dun & Cía in Mexico City, circa 1905