What are Winchester model 100 pre 64 284 cal serial numbers?

The Winchester Model 100 was a semi-automatic rifle produced from 1961 to 1973, and the .284 caliber version was introduced in 1963. Pre-64 refers to the period before the company's manufacturing changes in 1964. Serial numbers for the .284 caliber Model 100 typically start from around the mid-600,000 range, with specific numbers indicating the year of production and features. For precise identification, consulting a detailed Winchester serial number database or reference guide is recommended.