This is a vintage Avia Electronic Swissonic gents watch. It features a stainless steel case, a grey dial, and displays the day (TUE) and date (20).
Brand: Avia
Type: Electronic/Swissonic gents watch
Material: Stainless steel case
Era: Likely 1960s or 1970s
Features: Day and date display

brand new battery has been put in by a jeweller. has very light wear as photos show