A different clock was used in the Air India bombing, one that did not need to be plugged into a wall socket:
(According to Wikipedia): “On 8 May 1985, Reyat bought a Micronta digital automobile clock at the Radio Shack store in Duncan.[31] Designed for a 12-volt automobile electrical system, it could also be powered by a 12-volt lantern battery.”
https://en.m.wikipedia.org/wiki/Air_India_Flight_182 under the heading “Explosives and Clocks”
Ahmed’s clock was a vintage 70’s or 80’s radio shack micronta , catalog item 63 756
Plug in with battery back up
Just what every 14 yr old kid keeps around the house
At least from an engineer who blogged about building a copy
Now if and when little Ahmed’s family picks up the clock from the police, we’ll see if it is so