Bucuresti, Romania
R.A.T.B. (Regia Autonoma de Transport Bucuresti)
V3A-93-CH-PPC #4030
Detail of the squared key. However, most of the equippments on this tram can be opened only with triangle keys... since these are hard to find, the drivers prefer to use screwdrivers and other improvisation.

List of Bucharest trams.
Photo by Dr2005 - transportbucuresti.trei(a)gmail.com; More photos are available at www.transportbucuresti.trei.ro.