it is a schoolhouse regulator clock. does not look that old. can not see the picture clear, Is it hand wound or is it quartz? does it chime? cheep ones start at 20 bucks and go up into thousands from there....
i think it is a reproduction schoolhouse regulator clock, i dont see a key hole/s http://www.collectorsweekly.com/clocks/regulator Elgin 31 day regulator clock