Upcoming at the Seoul Cinematheque, June 9th-18th, is a program of Korean films from the 1950s. So far, six of the thirteen films are listed as having English sub-titles. The films are:
Yangsan-do (Yangsan Island) (Kim Ki-young, 1955) (90 minutes)
Piagol (Pia Village) (Lee Kang Cheon, 1955) (106 minutes)
Chongchun Ssanggogseon (Han Hyeong-mo, 1956) (100 minutes)
Jayu Buin (Madame Freedom) (Han Hyeong-mo, 1956) (124 minutes)
Muyeong-tab (Pagoda of No Shadows) (Shin Sang-ok, 1957) (117 minutes)
Jiokhwa (Flower in Hell) (Shin Sang-ok, 1958) (86 minutes)
Probably the most well-known of these films are Madame Freedom and Flower in Hell, both of which are discussed at length in the Korean Film Archive's A History of Korean Cinema. As can be guessed by the titles, both are melodramas. Yi Hyo-In devotes a section of his overview of 1950s Korean cinema on Madame Freedom with the title, "Madame Freedom, the Application of the Modern Thinking into a Film and the Repulsion Against It." Flower in Hell is of interest in both its subject matter (one of the lead characters is a prostitute servicing American GIs) and its apparent mixture of genres and styles. And Yangsan Island is the second film of the acclaimed Kim Ki-young. I know little else about the other films, although all appear to be from the melodrama era except for Pia Village, which I think is part of the war cycle and deals with a group of communist guerillas.
The cinemathque website has the times and listings, but not the translation of the titles, so go by the year and running time. I've also linked each film to its imdb page.