Yes, I requested a letter on SN 352388; and they said the records were lost. All they could tell me was that it was shipped on Jan 25, 1929. Colt has one shipping record book missing, and occasionally that happens.I guess I need to call them and ask them to look again? Has anyone ever had issues getting a letter? I have a couple Colt letters and a number of other letters and never had one sent back as unobtainable.