All of the descriptions for the watches and clocks on the Cadence Web site read:
"If you think 4:20 is the most important time of day, this watch is for you. If you have no idea why 4:20 is a special time of day, there is nothing here for you."
You can check out the full line of Cadence watches and clocks here. Unfortunately, there is only one model of wall clock and they appear to be sold out at the moment.