Since all of Oswald’s known transactions in connection with firearms after his return to the United States were undertaken under an assumed name,[C6-629] it seems unlikely that if he did have repairs made at the sports shop he would have used his real name. Investigation has revealed that the authenticity of the repair tag bearing Oswald’s name is indeed subject to grave doubts. Ryder testified that he found the repair tag while cleaning his workbench on November 23, 1963.[C6-630] However, Ryder spoke with Greener repeatedly during the period between November 22-28 and, sometime prior to November 25, he discussed with him the possibility that Oswald had been in the store. Neither he nor Greener could remember that he had been. But despite these conversations with Greener, it is significant that Ryder never called the repair tag to his employer’s attention. Greener did not learn about the tag until November 28, when he was called by TV reporters after the story had appeared in the Dallas Times-Herald.[C6-631] The peculiarity of Ryder’s silence is compounded by the fact that, when speaking to the FBI on November 25, Ryder fixed the period during which the tag had been issued as November 1-14, 1963, yet, from his later testimony, it appears that he did so on the basis that it must have occurred when Greener was on vacation since Greener did not remember the transaction.[C6-632] Moreover, the FBI had been directed to the Irving Sports Shop by anonymous telephone calls received by its Dallas office and by a local television station. The anonymous male who telephoned the Bureau attributed his information to an unidentified sack boy at a specified supermarket in Irving, but investigation has failed to verify this source.[C6-633] Neither Ryder nor Greener claimed that Lee Harvey Oswald had ever been a customer in the Irving Sports Shop. Neither has any recollection of either Oswald or his Mannlicher-Carcano rifle, nor does either recall the transaction allegedly represented by the repair tag or the person for whom the repair was supposedly made.[C6-634] Although Ryder stated to the FBI that he was “quite sure” that he had seen Oswald and that Oswald may have been in the store at one time, when shown a photograph of Oswald during his deposition, Ryder testified he knew the picture to be of Oswald, “as the pictures in the paper, but as far as seeing the guy personally, I don’t think I ever have.”[C6-635]