rednate,

You are right about that first character being a letter, and, it makes a difference (in terms of figuring out other dates codes).

My guess is, however, that the character is an I rather than an L, making the date:

I 29 9 = September 29 1959 (does that seem to be reasonable?)

I have changed that page. If you see any other mistakes, please let me know.

Thanks,
Tim