A lot of people don't realize that the .30-06 dates back to 1906, pre both world wars. Original pre WWI Mausers were offered in 7x57,8x57and other European and British calibers but also in US .30 1906 for the North American market.
The Mauser factory was destroyed during WWII and the tooling was pillaged and most machines went to France.The Mauser patent could no longer be enforced and many countries started producing their own versions of the M98 patent. FN produced M98 under license pre-war and continued producing their fine version of this action until 1946 when they simplified machining and produced the Deluxe action until they introduced the Supreme 400 series in 1959 until 1975.
Present day Mauser actions are produced in Germany by GolMatic. These actions are CNC machined and of very high quality with corresponding high price($7k).