I picked these up the other day and I’m wondering if anyone has any thoughts. I’ve heard that the numbers and letters present on the hand guard of the saw-back may refer to a unit however I’m unsure.

+The saw-back is dated to 1906 and manufactured by Erfurt. Appears to say "E. 13. 8L." on the hand guard.
+The bayonet with the reproduction frog doesn’t appear to have any visible date. It was manufactured by Frister & Rossman however the blade also carried the JA Henckels twins stamp.
+The third bayonet carries the date of 1917 and was manufactured by Carl Eickhorn.

Thank you for your wisdom and warmest wishes.