This HO gauge locomotive by Trix is 22528 a Prussian G8.1 Steam locomotive in Royal Prussian Railway Administration (Königlich Preußische Eisenbahn-Verwaltung)/KPEV green livery. It has the running number 4943.

The Prussian G 8.1 was steam locomotive operated by the Prussian state railways. It was a heavier, stronger development of the G 8 and was initially referred to as a 'strengthened standard class' (Verstärkte Normalbauart).

These engines were designed by Robert Garbe and built between 1913 and 1921, forming the largest class of state railway locomotives in Germany. The boiler was larger than that of the G 8, and the locomotive was designed to be heavier to haul even the heaviest trains without sanding, due to its higher adhesive weight. Because it had a high axle load, the G 8.1 could however only be used on main lines. In addition to its employment with heavy goods traffic, it was later used for heavy pusher duties as well.

A total of 4,958 engines alone were made for the Prussian state railways and, later, the Deutsche Reichsbahn. The Imperial Railways in Alsace-Lorraine were given 137 (see the Alsace-Lorraine G 8.1), 10 went to the Grand Duchy of Mecklenburg Friedrich-Franz Railway, 50 to the German military railways in the First World War, 6 or 10 to the Gewerkschaft Deutscher Kaiser coal mine at Duisburg and 185 were sold abroad to Poland, Romania and Sweden). Linke-Hoffman delivered 20 locomotives to the Swedish state railways (SJ) in 1918, as Class G.

In 1925 the Reichsbahn took over 3,121 Prussian locomotives as Class 55.25–56 with operating numbers 55 2501–5622.

More than 1,000 engines remained after the end of the Second World War. In 1968 the DR still had 150 locomotives, and the Deutsche Bundesbahn another 50, which they reclassified as Class 055 from 1968. The last G 8.1 with the DB, number 055 538–3, was taken out of service on 21 December 1972.

At least one remains in preservation. 

The loco is in good condition as you can see in the pictures, it is fully tested and runs with working lights.

 It comes complete with its box. 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 my other listings, I typically have various HO and OO locos on offer as well as an extensive range of imported N gauge locos and other items. 

Note: I do 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!).