Quote Originally Posted by outback View Post
That's a bellied, hollow grind. His is a faux frameback.
A true rattler is ground lengthwise from tang to toe, and the blades are very thin.
The term was both a specific grind and a descriptive term for the sound of shaving with it. I've seen a goodly number of other hollow ground razors etched with some variety of 'Rattler' (barber's rattler, special rattler, etc).