Etalon T121/T122 Barvinok (periwinkle) is a Ukrainian low-entry trolleybus of large capacity, produced at the Chernihiv Bus Factory since 2013.

In May 2016, Etalon T12110 received an autonomous running system that allows the trolleybus to travel up to 1 km on its own.

[1][2] The last batch of trolleybuses is equipped with electric motors AD903 U1 manufactured by Kharkiv plant "Elektrotyazhmash".

On December 24, 2016, Chernihiv received a batch of 10 new Etalon T12110 "Barvinok" trolleybuses.

On March 26, 2018, Etalon-Leasing, a dealer of the Chernihiv Bus Factory, won the tender for the supply of four new trolleybuses for the city of Sumy, resulting in 4 Etalon T12110 "Barvinok"s. In 2018–2020, Chernihiv received another 12 units of Etalon T12110 "Barvinok".