Thank you, Marv!
The ad you show us here is actually much more interesting.
Three watches - three different calibers!
825, 916 and if I don't remember incorrect the small travel clock has cal 911 inside.
The E 872 was one of the first Memovoxes using the full rotor caliber 916.
Do you know if E 870 Snowdrop was the first to use this caliber?
You are a man with a lot of interesting documents - do you know the exact year of the ad?
1969 or 1970?
Best, my friend
Blomman