My station manager was going through a bunch of stuff, and came up with a bunch of postal collectibles. She put them out free for the taking. I wandered over about a hour after the carriers had made off with most of the goodies, and was delighted when I found the following:
These are souvenir programs for the First Day Issue of the 24.1 cent Tandem Bicycle Zip + 4 presort rate. The stamp was unveiled October 26, 1988, in Redmond, WA.
If you'd like one of these, send me a PM. I made off with 25 of these, and I'll be posting this offer in C & V, the Women's Cycling forum, and naturally, the Tandem forum.