 The original nitrate negatives for the film have long disappeared.  The only extant film elements were 35mm interpositives struck in  1952, which had undergone a great deal of decay. This interpositive  was scanned at 2,000 lines of resolution and electronically restored  for the 2002 DVD reissue. The restoration was performed at Lowry  Digital by Barry Allen (II) (qv) and Steve Elkin (qv).