It certainly appears that all the old Blizzards had globes marked Dietz Blizzard Cold Blast New York. The 3-10-14 Loc-Nob was the last made and came out in 1914. I would guess they were no longer made after 1919. Actually the 3-10-14's are fairly common and are often found in junk lanterns. The prior Blizzard globes with no nobs are where they really get rare, but even those show-up occasionally. The globe before the loc-nob, 1909-1913, has the Dietz logo, and before that there is no logo, 1898-1908.