Nothing strange here, is blank deliverer by the Boentgen and Sabin, Solingen, finisher was some unknown maker in area of Berlin as G inspector proofed on pommel, on blade spine is C for Solingen. By some years there was not acceptance date stamped, could be 1915/16. So when stamped on blade the maker stamp they stamped too low and by finisher then it was covered with crosspiece by assembly, similar pieces by J.A.Henckels exist too.