Here is something you can do with old film reels

[Daniel D. Teoli Jr.]

[Phil Rhodes]

I have a ten-thousand-foot projector reel somewhere. I could make a big clock.

[Daniel D. Teoli Jr.]

Didn't know they make them that big. Is it rare?

BTW, photo of clock is from internet...fair use. 

[Phil Rhodes]

Something like this, about four feet in diameter:

 

 

[Daniel D. Teoli Jr.]

That's a monster at 4 feet. Biggest I've seen is 6000 feet.