4:50 on the watch would mirror 5:10
say what you want about Neon Revolt, and I have my reservations as well, but I recalled that he wrote a pretty thorough article on creating a deadman's switch:
https://www.neonrevolt.com/2018/07/27/so-you-want-to-be-a-whistleblower-a-crash-course-in-opsec/
o7, best to you Anon.
kek, and there went my short stint as a clock fag