An oak clock flatpack can be made at a workbench (Oak workbench or better) in the workshop of a player-owned house. Like when making the normal Oak clock, this requires 25 Construction, uses 2 oak planks, 1 clockwork and gives 142 experience. The flatpack can then be used on a clock hotspot in a Bedroom, either in building mode or not. This requires no Construction level and gives no experience.
The cost of making and selling an oak clock flatpack from scratch gives a profit of: -2,970
After completing the hard Fremennik achievements, hey can also be traded to Advisor Ghrim in exchange for 67 coins being added to your kingdom's coffers in Miscellania. See Flatpack: Miscellania reselling for details.