Wow, great set! I love this bank/charter because it went through four titles (I believe; First National Bank of Los Angeles, then Los Angeles First, then First National Trust and Savings Bank of Los Angeles and finally Security First National Bank of Los Angeles). I have a $20 with the FNB of LA title and a $10 with the LA FNB title that have the same treasury signatures (and the same bank president signatures; different cashier signatures). There are so many different Friedberg #/type/denomination/signature combo/charter period, etc. examples on this charter as it was in business for over 50 years and spanned all four charter periods. Definitely the most prolific So Cal bank from the National Bank era. I would love to have a First Charter note from this bank but they are beyond my budget.
Your $50 and $100 are especially impressive; beautiful shape. It's funny how you're having trouble finding the lowest denomination; I have both types of the very common Bank of America Charter #13044 1929 brown seals from $5 to $20 and even a type 1 $100 in high grade uncirculated EXCEPT for the type 2 $5; I just haven't come across one yet. My type 2 $5 from this charter is a 35 EPQ... It was easier to find my PMG 64 $100 than a high grade type 2 $5, and this is from the most common charter (or one of them) in existence.