[rolling_stone]

“l” (lower case l) and “1” (digit 1) are two separate keys on a typewriter. Guess the dumbocrat that faked it thought it would look more realistic if both “l” and “1” were defective.

As a person who owned a portable that only had one of the above, I feel confident in stating not all typewriters have two separate keys for 1 and l
I would guess it was and old model underwood or royal.

http://www.mrmartinweb.com/type.htm

[barb-tex]

I first typed on an antique Underwood, No #1 key, use LC l. As you can see, typed on a computer they look the same.
worked fine for 50 years.
barbra ann

[Lynne]

As an old school typist, I always used the lower case “l” for a one. It was acceptable. It does appears to be two separate typewriters. As for no letterhead or signature, we always put the carbon copy in the file (no photocopiers). The carbon paper had no letterhead and most people did not sign the letter with the carbon paper still in it so a signature would be in the file. As for the analysis of the font type, etc. I will leave that to the experts.

[Mom MD]

Or, as I was taught in typing class in the early 70’s, the lower case l and 1 key produced identical characters, and it was far easier to hit the lower case l key when typing numbers. Same with zero and uppercase O.