The AG Märkische Kleinbahn or MKB in Berlin

Berlin

Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...

 is a German railway museum and heritage railway, founded in 1981, with legal status as a society since 1982. It has set itself the task of preserving historical railway vehicles and other items of railway technology (e.g. signalling equipment, communication and safety equipment) in an operational state or for museum display and to make them accessible to the public. Their centre of operations is the locomotive shed at Schönow.

Vehicles

The MKB's vehicles, sites and special exhibits are maintained voluntarily by members. As far as permission for railway operations is required, the inspections required by law are carried out by the Federal Railway Office

Federal Railway Office

The German Federal Railway Authority has been the independent federal authority for the regulation of the railways in Germany since 1 January 1994...

 (Eisenbahn-Bundesamt).

Operational vehicles which can move under their own power are:

MKB 01 - Kleinlokomotive

Kleinlokomotive

A Kleinlokomotive or Kleinlok is a German locomotive of small size and low power for light shunting duties at railway stations and on industrial railways. It is usually powered by a diesel engine...

Kö 0128, 25 PS diesel engine

MKB 51 - Rottenkraftwagen ex Klv-51, 75 PS diesel engine

MKB 52 - Motorised draisine

Draisine

A draisine primarily refers to a light auxiliary rail vehicle, driven by service personnel, equipped to transport crew and material necessary for the maintenance of railway infrastructure....

 ex Klv-12, 26 PS petrol engine

MKB 53 - Hand-operated draisine ex TCDD, human powered

MKB 55 - Motorised draisine ex MÁV, 14 PS petrol engine

In addition there are various goods wagons (some still being refurbished), a Behelfspersonenwagen of Prussian

Kingdom of Prussia

The Kingdom of Prussia was a German kingdom from 1701 to 1918. Until the defeat of Germany in World War I, it comprised almost two-thirds of the area of the German Empire...

 design and a railway post van (stored).

Other exhibits

A ticket office based on a historical prototype, a ticket printing press, the training signal box "Frohnau" and the MKB's 'signal garden' give a glimpse behind the scenes of railway operations.

Operations

The MKB is a co-user of the Zehlendorf Railway in its own right. Rail services, as on other museum railways is not carried out by the MKB, operations are limited to shunting movements. Nevertheless visitors may ride on the vehicles on the museum site. Each year in September the activities and progress with the society's work are exhibited to the public at an open day.