Very unusual oak wall clock marked Holtzer-Cabot Boston. It is a programable clock via paper tape and punch holes much like later computer punch cards. Mechanism works on 110vac, wiring is rotten, unable to test. Paper tape is fragile at this point. In the bottom is a paper punch (see picture) in its box. Probably used in a factory setting to control certain devices during the day. Would be fun to play with. Case is Art Deco- 1940's. Measures 36 x 12 x 7". As you can imagine it is heavy-about 35 lbs., really prefer local pu.