This extremely rare mechanical charm has a drawer that opens when you press the lever, a most unusual characteristic for such a tiny charm. I've only seen it once before and quite fell in love with the tiny heart in the drawer. Note that this photo is significantly larger than the actual item which is only about 1/2" high. Worth approximately $100.

This silver charm is the smallest toy cash register I own at about 1/3" high. It's so small I wasn't able to take a successful photo of it, and had to use the manufacturer's catalogue photo. Nucre8ion, 2004. (a puzzle name for Nucreation)

Two silver charms with excellent detailing. 

This miniature is too small for a dollhouse, but not small enough to be a charm. I'm not sure what it was designed for, but the drawer does open which is remarkable in an item of this size. 

This lapel pin was presumably given to cashiers at some store. It says "Certified Touch Checker." Ha! I bet they wouldn't use that phrase today...

These Lego cash registers are the real deal.