What I believe to be the municipal flag of Ramón Santana can be seen in a photograph online. The photograph shows a dark blue flag with a coat of arms and a red motto banner hanging outside the Ramón Santana city hall. Based on what I can make from that photograph, I found a drawing of the municipal coat of arms here. Randy Young, 23 January 2016
The municipality of Ramón Santana lies within the province of San Pedro de Macorís in the southeastern part of the Dominican Republic. With a 2012 recorded population of about 16,500, Ramón Santana became a municipality in 1980. The town was originally named Guasa after a nearby river of the same name, but the name was changed in 1899. In 1938, the town was transferred from El Seibo province to San Pedro de Macorís.
Source: Wikipedia article Randy Young, 23 January 2016