The PENPEX Show was held December 1-2, 1990. It was sponsored by Peninsula and Sequoia Stamp Club members: Noel A. Bond, cachets; Landry Doster, food; John P. Dusel, advisor; Bill Farrell, advisor; Martin H. Feibusch, exhibits; Treasurer Fritz W. Gelb; Douglas H. Halcrow, cachets; Thomas R. Klein, Jr., food and frames; L. James Mosso, awards; Herbert K. Nishio, manager; Stuart J. Phillips, Caboose publisher; Edward G. Rosen, advertising, bourse, and security; Chair Henry A. Washauer, publicity; and Secretary Noreen E. Will, hospitality.
Exhibition had 48 frames of 12 pages each. Entry was open only to members of Peninsula, Sequoia, and Golden Gate Stamp Clubs. The show judges were William J. Oliver, James E. Jefferson, and apprentice Richard McLaughlin.
A complete History of PENPEX exhibit will be on display at PENPEX 2011 on December 3 and 4 at the Community Activity Building, 1400 Roosevelt Avenue, Redwood City. The stamp show is free and open to the public.