Pin curls were most common in the 50's and early 60's. Some used rag rollers, but they only worked well if the hair was fairly long. They were mainly used earlier than that.
Rollers began coming into use in the late 50's. When I was a little kid, about the time Kennedy came into office was when I remember seeing women at the "beauty parlor" with the smooth plastic rollers or setting their own hair with either the metal spiral rollers that were covered with plastic mesh with the bristle brush inside or less often with pink foam rubber rollers - Basically, when, thanks to Jackie Kennedy, more bouffant hairstyles became popular instead of the curlier pincurled styles.
It was nothing back then to see a woman running around town with her hair in rollers or pin curls so it'd look good later for a night out.
2C/3A/3B - mod. CG, med. to fine, normal to low porosity/normal elasticity
Current Main Rotation: MG217 medicated, GTTT or Aim2Health 'poos as scalp needs, YTCarrots or Elucence cond., Spiral Solutions Protein Trtmt & Deeply Decadent Cond., CJCCCC reg or lite, KCCC, AO Mandarin Magic, Giovanni LA Hold Hair Spritz + lots more, sporadically
HG Method: Super Soaker + Smasters-ing, brief upside down diffusing then clips or clamps & air dry. Blend gray w/henna glosses