OEWG' = ŒWG = The Steyr Factory Symbol
F.G.GY.' = Fegyver és Gépgyár symbol, on Hungarian made receivers, bayonets, 1891-1918
Explanation: The first number designates the Unit Number, 7 means 7th.
The letters in the middle are Unit Name abbreviations, LR means Landwehr Regiment
he last number group is the Weapon Number, 37 means Weapon Number 37