You will have to call Browning with the serial number.
Browning did not make the Model 70, Winchester did. Also, the serial number is not a valid Browning serial number for a 7mm Magnum rifle. Please doublecheck your information.
100-10000 USD depending on specifics
Need to know if it's a bolt action or a semi-auto.
7mm Magnum and 300 Winchester Magnum
Define 7mm. Do you mean 7mm Mauser ( a little less than 30-06), or 7mm Magnum, (a bit more than 30-06)
Made in both Bolt and Semi-Auto versions
243, 270, 30/06, 7mm Magnum, 300 Magnum
one thousand us dollars
Check with Browning customer service.