What is this mystery bike?

[Cormanus]

The AI in Google Lens had this to say:

The image displays a vintage motorcycle identified as a 1966 Sears Puch Sabre.
Make and Model: The motorcycle is a Sears Puch Sabre.
Year: It is from 1966.
Engine: It features a 50cc engine.
Transmission: It has a 3-speed transmission.
Speed: It is capable of reaching speeds up to 50 miles per hour.

See https://www.mopedarmy.com/forums/read.php?2,3980340