developer index became used as the unique identifier, e.g., 122-мм гаубица Д-30 (122 mm howitzer D-30). The change was not applied to old pieces, e.g., the...

152 mm gun-howitzer M1955, also known as the D-20, (Russian: 152-мм пушка-гаубица Д-20 обр. 1955 г.) is a manually loaded, towed 152 mm gun-howitzer artillery...

Bulgarian designations is 105-мм возима гаубица Д-20 “Круп” обр. 1916 and 105-мм возима гаубица Д-22 “Круп” ("Рейнска гаубица") обр. 1916 Also a similar...