ACR5X00000 ACR6Y00000
Made in Taiwan.
Fourth number in the serial indicates year of production (1995 or 1996). X in the serial indicates production Month (E to L - May to Dec). Y in the serial indicates production Month (A to D - Jan to April).
Bikes made in Taiwan usually had an 8 month production and shipping timeline before they were sold in bike shops around the world. In May of any year, factories would usually switch production to making models for the following year.