YMMI (Yamaha Music Manufacturing Indonesia) Made in Indonesia Serial Number: 5 Day, 15 Month, January Year, 2000 System # A 17 2001 2000, January 15 Unit Number YMMI (Yamaha Music Manufacturing Indonesia) Made in Indonesia Serial Number: QIHI 50001 2002, January 15 Unit Number Day, 15 Month, January (H=l) Year 2002 (0=0, 1=2)