Kato 10-1307 Keikyu Type 2100 Electric Passenger Train - 4-Car Powered Set

Prototype information from Kato's website:

Keikyu Series 2100 began the service in 1998 to succeed series 2000 on Keikyu mainline and Kurihama line. Series 2100 is an iconic train with two-door cars and direction convertible cross seats. It is operated mainly as rapid train or commuter express (named “Wing”). The body is made of aluminum and painted ivory beneath the windshield on the front side of top car. On the wiper cover beneath the windshield, the model number is displayed in letters looking like slits. The side windows are made un-openable and as wide as 950 mm vertically.
It used to be installed with an inverter made by Siemens, nicknamed “Do re mi inverter”, and the train is called “singing train” due to the melody of sound it makes.