Rumble Seat on Handle Bar for Cyclist’s Baby (Nov, 1938)
That looks safe.
Rumble Seat on Handle Bar for Cyclist’s Baby
When one proud father in Switzerland wants to take the baby for an airing, he fits a special rumble seat on the handle bar of his bicycle and away they go. The seat is equipped with a top to protect baby from sun or shower, but the top can be folded when desired.