What are those clocks called that have that fast moving pendulum?

[CoolTech]

What are those clocks called that have that fast moving pendulum? you see them in like sharper image and places like that.

 

Cukoo? Grandfather?

 

[FeathersMcGraw]

I assume you mean those clocks that look like metronomes that use persistence of vision to display the time. They're Fantazein clocks, although sometimes they're also called "message clocks".

 

[CoolTech]

thanks, just what i was looking for.