Koga Miyata Flyer, I am not sure but I believe it is from the 80s. The bike rides very well and is in very good condition with a few rust spots on the top tube and only needs a new chain. Frame height 57, Signature crankset and according to Koga Miyata Flyer it should have a 105 rear derailleur, saddle is a San Marco Rolls in brown suede, for more info or pictures feel free to write :)