I don't think I remembered to post a picture of the finished 3-string fretless bass I finished this summer. The player ordered a 5-string headless next, so that should be fun. :
ca. 1850 French 3/4 carved back - Steve Swan String Basses
The Amazing 3 String Bass by bassists on DeviantArt
Three-string Custom Box Guitar - The Cavan Project
Three String Bass — Hot Wire Bass
Amazon.com: Rogue LX205B 5-String Series III Electric Bass Guitar Candy Apple Red : Musical Instruments