Mr. Eisenberg. Another point then, which should have been covered this morning, Mr. Frazier, in your qualifications: have you testified before in court?
Mr. Frazier. Yes; I have.
Mr. Eisenberg. Can you estimate the number of times?
Mr. Frazier. Approximately 400 times.
Mr. Eisenberg. Finally, we had discussed briefly your examination of consecutively manufactured bolt faces to see whether any two such consecutively manufactured bolt faces were identical in their microscopic characteristics. How many such examinations have you performed.
Mr. Frazier. I would say about four examinations of pairs of bolt faces which have been consecutively manufactured.
Mr. Eisenberg. And in each case the result was what?
Mr. Frazier. The marks on one bolt face in no way resembled the marks on the other bolt face.
Mr. Eisenberg. Mr. Frazier, we were just beginning to discuss, before the recess, Commission Exhibit 559, which is a picture, as you described it, of Exhibit No. 543 and a test cartridge under a microscope, and that is also known as C-6 and C-14, is that right?
Mr. Frazier. Yes, sir.