Item No.: #5A170 This item was removed from a Yamaha SF-700 manufactured in the 1970s. Considering the business aspects, parts were likely standardized as much as possible, so it's believed this part was also used in other models manufactured around the same time. Aside from the model name stamp, this is a common part for the early and late SF series (SF500/SF700/SF1000) and the SG series from the same period. However, as far as I know, there seem to have been two slightly different screw pitch variations (approximately 5.0mm and approximately 4.7mm). (Comparing them side-by-side, the overall size is also slightly different.) The item has been cleaned and polished with polishing compound before listing, but it is not completely free of dirt and other imperfections.