The Sabah Foundation.  Three S.W. Singapore cards (KK8210) are available, all mailed.  One has a Sabah stamp and clear 1990 postmark (Grade: 1, $3).  One has a Sabah stamp, orange postal bar coding, ink transfer on front, and too-faint postmark (Grade: 3, $2.50).  The other has an uncancelled Sabah stamp and staple holes on the top (Grade: 5, $1).