Need Help Identifying Model and Year of Miyata Bike
I recently purchased a vintage Miyata Bike but would like to know the year and model. It's white with black lettering. I have the serial number but I'm not completely positive on the first letter. It's NS90 905713. But the first letter could also be an O. It has Shimano 600 gears, brakes and pedals. On the cross bar it has SplineTripleButted by the seat. and on the crossbar by the handlebars it has 414 in green and white. And CRMO on the forks. Can you help me identify the year and model please? Any help would be appreciated. Thanks