For years I’ve been carting around an old cookie tin filled with rubber stamps I’ve been collecting for more than 30 years, and I finally took it off the shelf today to see what was inside, newly-equipped with an ink pad from Denis Office Supplies.

I wonder if it’s still possible to send 1st, 2nd and 3rd class mail. I wonder why I have a rubber stamp of AMBER.
Comments
Both White No. 2 and Amber are also wheat-describing adjectives (“Canada Western Amber Durum” and “CPS White, No.2, Canada Prairie Spring White”).
Amber in uppercase has the tone of an operation, a covert note brazenly stamped on an envelope.
If you're looking for more inspiration for stamps w.r.t. operational code names, here's a sampling from a Düsseldorf Kunsthalle exhibit: https://www.flickr.com/search/?sort=date-taken-desc&safe_search=1&tags=kunsthalle&user_id=96947578%40N00&view_all=1 It was a giant wall filled with word combinations suitably meaningless for operation code names.
I am