Headset Size
1"
Seatpost Size
22.2mm
Top Tube Size
Unknown
Original Colours
T6XX0000 T7XX0000
Made in Taiwan.
The second digit in the serial sequence is a number it indicates the year of production. 6=1986 or 7=1987. The third and fourth digits indicate production month. Shown as XX in the example above.
Bikes made in Taiwan usually had an 5-8 month production and shipping timeline before they were sold in bike shops around the world. Bikes welded in the later months of the year would normally be made for the following year.