Bombs and timers

Factual Questions
1

Do bombs in real life really come with a countdown display of numerical digits? And do they “tick”?

2

  1. No.

  2. Yes, if they are built using a mechanical alarm clock.

3

  1. They can.

  2. They can.

4

Both of these things are possible, sure, but I’d guess they’re extremely uncommon. Most bombers would not want to go to the trouble of adding a numeric display which could only serve to help the bomb squad know how much time they had before the thing went off (unless it was a ruse, but…) And modern electronic timing circuits don’t tick, obviously. If anything, they hum, but even that’s unlikely if they’re not powered from line voltage (i.e. a wall socket).

5

Which circuit are the green and red wires attached to.