Lot 71198 – 1894 (Aug 10) « On Postal Service » printed envelope from the Postmaster at Mombasa, sent to the USA

1894 (Aug 10) « On Postal Service » printed envelope from the Postmaster at Mombasa, sent to the USA with 1890-95 1/2a and two 1a paying the overseas rate, tied by Mombasa code A cds with further strike adjacent, reverse with Zanzibar, New York and Roxbury Station datestamps, a few cover imperfections, thought to be the only recorded example of this « On Postal Service » envelope, ex Krieger.Note: It is likely that the privilege of free postage for official mail was not applicable on mail to foreign countries. No franking was required for internal official mail and were therefore probably discarded.