doublegunshop.com - home Forums General Discussion German & Austrian Sporting Guns @ doublegunshop.com Heym rifle date of manufacture

COW lists the 7X75 R VHE as circa 1939 and I have a pre war Meffert drilling rechambered for that cartridge.
I've rechecked the action markings and yes the action is marked "GEBRUDER HEYM" and "SUHL". It also has the serial number and the eagle over N and the eagle over J marks.
The barrel has the date 245, an eagle over N, and the Suhl proof house mark. No caliber or load data.
Do you know if the Heym brothers marked their rifles "Gebruder Heym" during the war? I thought that the action was pre war and that the eagle over J was added when the rifle was rebarreled in 1945 but maybe it isn't a pre war action.
Otto