The Oscilloscope Watch has all the features of a modern watch (time, calendar, alarm, etc...) combined with all the features of the popular Xprotolab (Oscilloscope, Waveform Generator, Logic Analyzer, Protocol Sniffer, Frequency Counter).
MSP430 watch with some upgraded components. It features OLED display.
DIY Digital Wristwatch (N|Watch)
DIY wristwatch with OLED display and ATmega328P microcontroller from Zak Kemble.
Open source Time Machine #2 (OTM-02)
OTM-02 is an open source watch module designed using KiCad. The project has a strong focus on using readily available off-the-shelf recent or latest technology, from global suppliers.