Bucuresti, Romania
R.A.T.B. (Regia Autonoma de Transport Bucuresti)
V3A-93
Coupling between #057 and #073. This type of coupling was adopted after 1975, when the Tatra T4R trams arrived (and they were equipped with this type of couples). The trams of that time (including the "new" V3A - first built in 1973, last scrapped in 2007) were equipped with a different type of coupling system, that needed a shackle to be placed between the 2 couples, while the ,,new" system requires only two (BIG) nails).

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