A few more of my WWI era fuzes. The Russian 21 second PTTF is mounted with a small tag that says "Russsian 21 second combination time and percussion shrapnel fuse. Manufactured by the Taft Peirce Mfg Company, Woonsocket, R.I., U.S.A." The 1907 is shown with the brass fuze cover that it came in with the container marked 1907. The Mk III AAF is an anti-aircraft fuze.