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« 7 JOHN EDGAR HOOVER _ DIRECTOR Federal Surean of Investigation United States Department of Justice Washington, B. C. duly 15, 1947 centlenens There is attached a photograph of two used were forwarded to the Iaboratory of this Bureau for examination in | connection with an investigative matter. Please advise as soon as canpany has manufactured ee and description of these e domestic and foreign 57] D : distribution of those from your factorys Otherwise, any available information which might be of assistance in identifying ° . 2 the manufacturer of these am :: requested, S All catalogs and available detailed technical descriptions b? D eS of your production would be of great assistance as confiden— oe tial reference material in this Laboratory. ossible wether or not your having the appearance Please consider this inquiry as confidential. It is desired that you return the attached photograph with your. response marked for the, attention of the FBI laboratory. Any assistance you can render in this matter will be greatly appreciated. é d Very truly yours, , we fa John Edgar Hoover ©: oF Director — a Attachment os he bee bee, wt? wo. oe OF : o- ae ee ee _ : —