ARS SELECTIVE EXPOSURE METER vintage 50's Japanese meter ARS Light Meter Main Unit Case ARS Light Meter (Exposure Meter) Comes with a case There is a faint sign of a signature on the side (Photo 5) Considering it is an item from about 70 years ago, it is relatively clean. As it has been stored for a long time, yellowing and stains can be seen. As it is a used item, there may be fine scratches, dirt, and other age-related deterioration in areas not visible in the photos. If you have any questions, please feel free to comment. For those who understand it as an antique collection, thank you for your consideration. Will be shipped with waterproofing + anonymous shipping. This is an antique camera exposure meter called the ARS Selective Exposure Meter. Function: It is a calculating device used to measure the intensity of light during photography and calculate the appropriate shutter speed, aperture value, and film sensitivity (ASA/ISO). Features: As the dial reads "BASIS ASA 100," it is designed to calculate based on ASA 100 film. Uses: It is mainly used as a collector's item for vintage cameras or as an auxiliary tool for manual shooting.