Item No.: #5A044 This is a part removed from a Yamaha SC-800 manufactured in the 1970s. Considering the business aspect, parts should have been standardized as much as possible, so it is believed to be a common part with other models. Based on my confirmation using catalogs, etc., it appears to be compatible with the following models manufactured around the same time. (In addition, there is a possibility that it was also installed/used in other models manufactured around the same time.) SC700/SC800/SC1000/SC1200 SJ500/SJ800 SS300/600/700EX *Although similar types of tuners were also installed on Yamaha's original 6-in-line tuner models from the mid-80s onwards, those do not have any markings. This is a single item (one piece, individual) for sale as shown in the photo. It has been cleaned and polished with polishing agents before listing, but the dirt etc. may not be completely removed.