Very nice find on both SAKs, meanx; the reverse-crimp bottle opener-equipped Bantam existed for a short period of time until the combo tool design found its way into SAKs.
These appear to have been in use for a fairly short time at some point at the very end of the '70's to perhaps the very early '80's. You can see them being used on this page on both the Waiter and the Tourist.http://www.sakwiki.com/tiki-browse_image.php?galleryId=55&sort_mode=imageId_asc&imageId=919&scalesize=0