Eterna Matic Kontiki 20. Ref. 128TT. Not much information available. The watch has a diameter of 36 mm but is one of the few watches that looks smaller than it actually is.
This dang X33 has been getting all my wrist time. It's just so handy to have all these timer and alarm functions, but to also not have the distractions of a smart watch.
I'll have to make it to my vintage watches someday when life is less busy and I don't need 3 alarms to function.