precancels

v.

（收寄大宗邮件或邮包时）预先盖销（邮票）( precancel的第三人称单数 )；

Yesterday in U.S. Stamp News: The Stickney Press Precancels and Overprints
United States Precancels on the 1847 Issue
Stamps in the Mailstream: Collecting Precancels in Today's Mail
Precancels in Today's Ad Mail
The Stickney Press Precancels and Overprints
Post-canceled Precancels
Precancel Stamp Society of Great Britain Index of Articles Published in 'Precancelist', 'Lee's Summit', and 'Precancels' from 1947 t...
150 Years of U.S. Precancels
Off the Beaten Track with Allen Bohart: Silent Precancels
Local Precancel Collecting