COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 2020 Konkoly Observatory Budapest 1981 September 28 HU ISSN 0374-0676 AUGUST 1981 FAINTENING OF V 348 Sgr The irregular variable V 348 Sgr has recently fainted by several magnitudes (from V ~= 12 to V ~= 18) in a very short time (from Aug. 18 to 22, 1981 essentially). Photometric data in the uvby system have been collected by the undersigned during this period with the 1m telescope of the European Southern Observatory at La Silla, Chile. These observations are presently being reduced and a detailed report will be published later. This note aims mainly to invite other possible observers of this dramatic drop of brightness to join for a common work. Obviously data with a finer temporal resolution and wider spectral coverage will lead to a better understanding of this phenomenon difficult to catch in this puzzling object. ANDRE HECK IUE Observatory ESA Satellite Tracking Station Apartado 54065 Madrid - Spain.