[FreedomPoster]

More on that from a quote I found some time ago:

The term “regulated” applied to clocks means “accurate in keeping time”. It made sense, particularly in 18th Century armies, to pay a lot of attention to how well soldiers could operate in massed formations. Soldiers had to be drilled to load, aim, and fire as one unit. You do NOT want the rifle next to you to be firing (and emitting a shower of sparks) while you are pouring gunpowder into your musket. Everybody had to do every step together with no screw ups.

[BroJoeK]

FreedomPoster: "The term “regulated” applied to clocks means “accurate in keeping time”.
It made sense, particularly in 18th Century armies, to pay a lot of attention to how well soldiers could operate in massed formations."

Thanks for that explanation, makes perfect sense.
I've always wondered about it, never saw it explained before.