[Dave Boy]

^ Readily available on Amazon and ebay. The serial is in public domain so there are a couple of versions and some copies of discs out there, some really cheap.
Picture and sound are good. I was suprised as there is no remastering done to these old serials.
King of the Rocket Men DVD 1949 Region 1 US Import NTSC: Amazon.co.uk: Tristram Coffin, Mae Clarke, Don Haggerty, House Peters Jr., James Craven, I. Stanford Jolley, Douglas Evans, Ted Adams, Stanley Price, Dale Van Sickel, Tom Steele, David Sharpe,