This virtual cache has four parts. All are within the sight of a blind person. Email me the name these buttons depict. As always do not post the answer in your log or the wrath of an old duffer will be upon you.
While you're at it, head about .6 miles north and grab Waymark WM79F.
(Note from NightKnight: To provide a little history on this cache - When putt first published this cache there was no "unknown" type. Putt wanted this published as a multi, since there were two parts to be able to log a find. The reviewer wanted it published as a virtual, since there was no final container. Of course, the reviewer won out and it was published as a virtual. NOW it would be a question mark/unknown cache. You might want to keep this in mind while looking for putt's buttons.)
NOTE - THE BUTTONS ARE NOT THE RIVET HEADS ON THE GUARD RAIL, THE ANSWER WILL NOT BE A COMPANY OR BRAND NAME.