Looks Familiar? These bulbs could be used for torchlights, radio panels and bicycle lamps too. I do wonder; were they long-lasting bulbs? Related posts: The Toys of Yesterday… A Bit of Nostalgia Anniversary Souvenirs Souvenir Shopping Bag By felicia|2017-03-06T16:50:54+08:00March 6th, 2017|Categories: childhood, Identify Photographs|Tags: bulbs, Osram|2 Comments Share This Story, Choose Your Platform! FacebookTwitterLinkedInRedditWhatsappGoogle+TumblrPinterestVkEmail Related Posts Teen Idols? Gallery Teen Idols? Singing with emotion Gallery Singing with emotion Then & Now – Movie Posters Gallery Then & Now – Movie Posters ‘Reel’ life Gallery ‘Reel’ life “The Greatest Show on Earth” Gallery “The Greatest Show on Earth” 2 Comments Ngai C O March 7, 2017 at 10:44 am - Reply Hi, The bulbs were either 6 volts or 12 volts. I could not make out the voltage rating from the picture. 12 volts was much brighter. For bicycle lights, one had to fit the correct voltage bulb that corresponded with the dynamo voltage. Or risked blowing the bulb if using 6 volt bulb with 12 volt dynamo. Conversely, if 12 volt bulb into 6 volt dynamo, the light would only glow or be very dim. The same behavior equally applied to torches and radios. As for its lifespan, it could be anything around a few hundred hours of continuous use if it was not subjected to wide fluctuations of voltage or excessive current. These bulbs are still available but a rarity in use. Certainly not used in radios or bicycles unless one still has vintage functioning equipment. Leds are the norm for all such lighting purposes. They use only a fraction of the power to produce the equivalent light output and operate at lower voltages from 1.5 to 3 volts typically. Usually, the electronics driving circuit fails before the led unless the led is driven beyond its recommended current threshold, which is unlikely to happen due circuit reliability. The likelyhood of bulb failure whilst using the bike or torch light is so remote that there is never any need to carry spare bulbs. Such lamps are also so small that they can be kept in pockets. Mobile phones come with torch lights as standard assessories and even some key holders have tiny torches that produce light that required a bulky torch light weighing in excess of half a pound or more. NCK March 7, 2017 at 12:49 pm - Reply I don’t recall having to change the bulb on my bicycle often. But if you abuse the bulb, say you playfully make flashes by repeatedly pushing and releasing the small push button on a torchlight, the bulb will blow in no time. That was what one of my friends did. Leave A Comment Cancel reply Comment Save my name, email, and website in this browser for the next time I comment. Prove that you are a human!