Winchester Model 70-30 Gov'T' 06

[namibia]

I inherited a model 70 in 30-06 from my dad and would like to determine year of manufacture. Unfortunately the barrel is shot-out, and needs replacement. But before I proceed, I would like to Identify the year of manufacture?
On the barrel is the following markings: Winchester proof steel. Made in New Haven Conn. US of America. Winchester Trade Mark. Model-70-30Gov'T'06-. No s/n is found on barrel except the numbers: 1906 and 49- on the underside near to the thread. s/n on the action is 138281.
Can someone help?

I also recenly saw another Winchester Model 70, stamped: Winchester proof steel. Made in New Haven Conn. US of America. Winchester Trade Mark. Winchester Model-70-30-06 SPFTD. s/n on action is 395 336. Except for manufacturing year, why the difference in the barrel stamping when it come to caliber?

 

[MMCSRET]

1950 Manufacture. Manufacturers of most everything change little things in almost everything. Look at Ford F-Series and the variety of makings that Ford has used over the years. Don't consider the style of body or colors; just the markings.
Your second s/n dates to 1957.