X0202 4 2006-12-12 0000939729 WESTERN POWER & EQUIPMENT CORP WPEC 0001319959 Costa Brava Partnership III LP 420 BOYLSTON STREET BOSTON MA 02116 0 0 1 0 0001319943 Roark, Rearden & Hamot LLC 420 BOYLSTON STREET BOSTON MA 02116 0 0 1 0 0001071036 HAMOT SETH W 420 BOYLSTON STREET BOSTON MA 02116 0 0 1 0 Common Stock 2006-12-12 4 P 0 5000 .54 A 1356299 D The securities reported as directly beneficially owned by Costa Brava Partnership III L.P. may be deemed to be indirectly beneficially owned by Roark, Rearden & Hamot, LLC and Seth W. Hamot. Seth W. Hamot is the President and sole member of Roark, Rearden & Hamot, LLC, which is the sole general partner of Costa Brava Partnership III L.P. Pursuant to Instruction 4(b)(iv) of Form 4, Roark, Rearden & Hamot, LLC and Seth W. Hamot have elected to report as indirectly beneficially owned the entire number of securities owned by such limited partnership, however each of them disclaims beneficial ownership of any securities, and any proceeds thereof, that exceed its or his pecuniary interest therein and/or that are not actually distributed to it or him. /s/ Seth W. Hamot, Managing Member of Roark, Rearden & Hamot, LLC, General Partner of Costa Brava Partnership III L.P. 2006-12-12