Nice lanterns, Harry! The M-2-16 is good evidence that the return to plain tubes on the Blizzard Mill was probably done in 1915 when the vertical tube reinforcing was added to the Wizard, Blizzard, D-Lite and Monarch. The Little Wizard most likely should be added to the list, but I have not confirmed it. The M-2, on Blizzards, appears at way higher frequency than any other month; so February appears to have been the main month for Blizzard production in the New York plant.