I still ain't got no letter...
Even if I did, I'd loose it. The cleaning and packing process for the relocation is making my house look worse than it ever has. And, I guess I took more parts off the 40 than I thought! That junk is everywhere!
You have a letter. I etched it into the inside of your distributor I just sold you. You will need an electron microscope to read it. But it's there.
Electron microscope sold separately.