This very nice 3-rail AC HO gauge locomotive by Marklin is 37538 a DB BR 120 electric locomotive in cream and red Livery. It has running number 120 002-1.

The locomotives were one of the first electric locomotives with three-phase motors controlled by thyristor-based power electronics. This principle lay the foundation for all current electric and diesel-electric rail engines. For this, the BR120 is often acclaimed as milestone in locomotive technology. 

The design was intended to be the first truly universal locomotive, capable of pulling fast passenger trains as well as heavy freight trains. While the electric equipment exceeded expectations, the mechanical part suffered from its lightweight construction necessitated by the heavy electronics of the time.

All examples were withdrawn by 2021.

The loco is in good condition as you can see in the pictures, We are unable to test it as we do not have a three rail AC test rig or track, so we have not tested it but can see no reason why it would not run. It is sold in untested condition, this means that it may not run, and as such it is not being sold in running condition. However a complete external visual inspection has shown no reason why this loco would not run and the overall condition is very good. 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!).