Clock with 24-hour dial - has a dial which shows 1 to 12 or 13 to 24 by using oblong slot

摘要

The clock has a mask with twelve openings mounted in front of the dial bearing two rings of numbers. The numbers are arranged so that one ring of numbers 1-12, will show through the twelve openings when the dial is in one position. The second ring of numbers 13-24, is arranged so that 13 is placed above 1, 14 above 2, etc. up to 24 above 12. When the dial is moved vertically downwards behind the mask the numbers 13-24 will show through the twelve openings. The dial is free to slide in the vertical plane guided by two pins which pass through vertical slots in the dial. A lever from the clock movement moves the dial behind the mask.