The M69 is a Danish model.
It is really called Otterup M69, and is basically a Mauser 98 action fitted whit a Otterup/Schultz and Larsen 6,5x55 match barrel and fitted whit Diopter sights, new stock, and new trigger, and the bolt is also refurbished.
The M69 has been build on nearly all Mauser actions. Brazil Mod. 1908. Czech VZ.24. Mauser K98K. and so on, and so on.
The K98K Was normally whit a bent Bolt, where the M98 was a straight bolt.
The G33/40 is a really good actions for rebuilding to bigger calibers as 500 Nitro express. and so on
If i where to build a rifle in a new caliber such as 6,5x55. and in that group, and I wanted a very good action, whit out going into details about different plants i would choose a action that was NOT build in and after war time. 1914-1932 and from 1940-1945. 1939 is a okay year.
I have been lucky enough to buy 2 M69 build on Brazil Mod 1908, that was build at Mausers Oberndorf plant. It is 100% milled actions, no sheet metal (not even the follower) it was original chambered for 7x57 Mauser, so the basic size of the cartridge is good for medium calibers, and it is a very good action.
The rest has been say'd
Best Regards Riddersholm