(YouTube Link)
Courtesy of the British Medical Asssociation, Wired has a collection of seven videos from the 1930s showing common surgeries. They're good demonstrations of what has changed and what hasn't in the past seventy years of medicine. The video above is of a Caesarean birth. Others include brain, ovarian, and tonsil surgeries. Note that these videos are medically graphic and not for the squeamish.
Link
I think this is full of win, but, I can explain my fascination thus: I wouldn't be alive today if not for a doctor inventing a procedure invented in the 1930s. (Ladd's Procedure, specifically, prior to which there was a 90% fatalty rate for infants born with 'my' deformity.)
Man, he really just dove in there and dug that baby out.
This was relevant to me as I was a Cesarean birth.