US Letter sheet. Invitation to participate in a mail art exhibition in Philadelphia: "SEND ANY CONTAINER OF RAIN". Photocopied collage of woman with an umbrella, holding an icosahedral globe under her arm and text: "LEAVE A JAR OUTSIDE", "when it rains". Hand-written inscription to Bakhchanyan on reverse in blue pen. No cover, address plate, postage stamps, or postal markings.