This is a very rare and niche offering: two 34mm color filters for Waltz Leica Summar lenses – one for floodlights and one for flash. Waltz was a company that made niche accessories for Leica and other brands decades ago. The original box and case are marked "for SUMMAR (Summar) 34∮". General strobes started being used around the 1970s. Before that, flashbulbs and flood lamps used in studios were common. Daylight film requires color correction when shooting with flashbulbs (3500-4000 Kelvin) or flood lamps (3000-3200 Kelvin) in dark places, as they have different color temperatures than sunlight (6000 Kelvin). These are color filters for that purpose. In modern digital photography, color temperature is automatically corrected, so most people are probably unfamiliar with these. However, understanding this is a way to deepen your knowledge of photography. The number of people using film cameras and photography is increasing again. Collecting accessories like these after gaining knowledge is also a great way to learn. Also, for Leica enthusiasts, collecting items with the lens name "Summar" printed on them is fun. These are not items you can easily find. This is a rare item that I acquired when I owned a Summar lens. They can be attached to lenses with a 34mm filter diameter. An instruction manual is also included, so I believe you will understand. The condition is that the original box shows signs of aging, but the filters and glass are very clean. The craftsmanship is excellent, packed with Japanese technology. This is an extremely rare and beautiful item. For Leica lovers, please consider this. Not only for Leica fans, but also for Nikon and Hasselblad fans, how about it?