Fabulous old Philips footage. I'm currently restoring a 1929 Philips Model 2510 which is featured in this film, as are its E442, E415 and C443 valves! There is even footage of the making of the Philips "Sevenette" speaker that goes with it. I'm restoring that too! Thank you for posting this video.
Beautiful X-ray tubes !!! I remember my times at Siemens at the glasshop , the guys there where the only chosen which where allowed to drink beer at work. (We made big vacuum-tubes for radio-stations , 50kw emitting power)
Back when industry was strong, people worked hard in those days, bring back the 12 hour shifts, most of these workers walked to work did a 12 hour shift and walked home, bathed in a tin in front of the coal fire.