396. APOLLO 15 CREW-SIGNED PHOTO Fine S.P., 8" x 10" b/w, a NASA-issued photo with caption on verso, showing Dave Scott demonstrating the equal effect of lunar gravity on a feather and a hammer he has dropped while standing on the moon, a grainy image from a television transmission, signed by DAVE SCOTT, AL WORDEN and JIM IRWIN. Fine. $200-300