This really nice 3-rail AC HO gauge loco by Marklin is 3106 a DB BR 78 steam locomotive in black livery. It has running number 78 355. 

The Prussian T 18 was the last class of tank locomotives developed for the Prussian state railways. They were originally intended for services on the island of Rügen as replacements for Class T 12 and T 10 engines. They emerged when a class of locomotive was conceived in 1912 that was to handle express and passenger trains in border areas or in shuttle services on short routes. A tank engine design with symmetrical running gear was envisaged because, unlike a tender locomotive, it could run equally fast forwards and backwards and could be operated on return journeys without having to be turned on a turntable. 

A total of 534 engines were built from 1912 to 1927, mainly by the Stettiner Maschinenbau AG Vulcan and, from 1923, also by Henschel, of which 458 alone went to the Prussian state railways and, subsequently, the Deutsche Reichsbahn. The Reichsbahn took over 460 vehicles from Prussia and 20 from the Royal Württemberg State Railways, incorporating them into DRG Class 78 with operating numbers 78 001–282 and 78 351–528.

The class was retired in 1974. At least five remain in preservation. .

The loco is in good condition as you can see in the pictures, the locomotive is tested and runs with working lights. We have tested it on rollers both in the forwards and backwards directions, it is a little noisy so likely could benefit from a service.  A complete external visual inspection has shown the overall condition is good, please see the pictures in the gallery for a good look a the loco. The box is in good if slightly shelf worn condition. 

Overall this is a really nice scale locomotive and would look fantastic on a layout.

Do please have a look at our other listings, we typically have various HO and OO locos on offer as well as an extensive range of imported N gauge locos and other items. 

Note: we recommend all locos are cleaned & serviced, as they have some age to them even if the quality looks at the highest level (fairly standard advice for all locos!).