I never tested it, so cannot guarantee that mechanism is working. Some kind of very hard plastic. Heavy and solid old school wall clock. Diameter: 34cm or 13", depth 3.5 cm or 1.6". Please take a look on the photos for more info.Some scratches, paint, upper corner broken which is not problem for construction and hanging. Other sign of times which gives it charm! Please contact me if interested! The item "Large Vintage Industrial Wall Clock 1970s Original School Factory Train Station" is in sale since Tuesday, September 21, 2021. This item is in the category "Collectables\Decorative Collectables\Clocks\Wall Clocks". The seller is "ivojovanovic" and is located in sofia. This item can be shipped worldwide.