I not sure that officers were issued with revolvers. If they had them, I think they would have purchased them self’s, and the ammunition. But I could be wrong.
Early models such as the Webley-Green army model 1879 and the Webley-Pryse model were first made during the 1870s. The best-known are the range of military revolvers, which were in service use across two World Wars and numerous colonial conflicts, but Webley & Scott also produced a number of short-barrel solid-frame revolvers, including the Webley RIC (Royal Irish Constabulary) the revolver was designed to be carried in a coat pocket for self-defence.