Dating model 70
WACA members who are also CFM Members will receive 15 additional record searches on top of the regular quantity of searches included in the standard CFM membership package, regardless of membership level.
If multiple models appear for your serial number simply match the date with the appropriate model, as certain vintage firearms can share serial numbers between different models.
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For purposes of determining if your gun is legally considered an “antique” (pre-1899 DOM), the BATF has told us they use the DOM dates published by the manufacture (Winchester).
In order to be more accurate, you can use the serial number as an indicator.
If your gun was manufactured prior to July of 1975, you can use the chart below to ascertain the years of manufacture, but you will not be able to ascertain the exact date.
Pb-activity measurements in 51 lake-sediment cores from 32 lakes in the four PIRLA (Paleoecological Investigations of Recent Lake Acidification) project regions (Adirondack Mountains [New York], Northern New England, Northern Florida, and the Northern Great Lakes States).
General application of the Constant Rate of Supply (Constant Flux) model for Pb profiles in only seven of the cores, all from either the Adirondacks or the northern Great Lakes states, exhibit exponential decay curves.
Deviations from an exponential profile include a flattening of the profile in the top few cm or excursions of one or a few measurements away from an exponential curve.