Two Pairs of Second War Kreigsmarine Rank Chevrons

Two Pairs of Second War Kreigsmarine Rank Chevrons - One pair of Gefreiter rank chevrons (one of which is stamped in blue ink "RL" on the reverse, the other is unmarked) and one pair of Obergefreiter rank chevrons (one of which is date stamped in black ink "K. 10. 12. 38." on the reverse, the other is unmarked). Each patch has blue chevrons sewn upon a white cotton base, 72 mm x 92 mm each. Uniform worn, ranging from fine to very fine.