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Old 03-03-2013, 5:33 PM
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steve91104 steve91104 is offline
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Here's some info on your serial number:

"3) The "OT" series, all of which have an OT prefix followed by five numbers. All the ones I have heard of are in 308 Winchester. Estimated production is 60,000."

from this page:

Last edited by steve91104; 03-03-2013 at 5:37 PM..
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