* [[Dk'tronics Real Time Clock]] ([[Dk'tronics]])
* [[Dobbertin Smart Watch]] (the RTC itself is inserted like a ROM) ([[Dobbertin]])
* [[Schneiderware Real Time Clock]] (DIY) ([[CPC Schneider International]])
* [[SYMBiFACE_II:Realtime_clock|Realtime Clock]] of [[SYMBiFACE_II]] (modern RTC with bugged century counter)