That clock is pretty easy. Just count the number of parts sticking out of the center (in this case 12) and then just make a cylinder with that many sides and extrude them all.
Day 12: Likeness Humphrey Bogart Part B - More detail, but problems with mouth and eye form. General curvature of face improved, but likeness is still off.
Featured in the GameTextures Cyber Monday Guide for Vidya Game Artists: http://gametextures.com/blog/2013/12/02/how-to-cyber-monday-for-video-game-artists/