Your height: 5'1" to 5'6" (155.54 à 168cm) approximatly (?).
Frame size = 20.00in/51cm
Comments:
Vintage Bikes: They are comfortable, simple and stylish. For short trips, occasional use, collectors, do-it-yourself projects, to decorate. Heavier, less performant and less reliable than modern bicycles. Fully functional, ready to ride, no warranty.
3 speed: simple and easy to use, perfect for daily cruising around town on a rather flat terrain. Not so good for medium and steep hills, ok for smooth climbs only. - Derailleur: Shimano
Tires 26 x 1 3/8: narrow tires with small thread, for paved road, very common on older bikes.